Exhibit 24.1

CGI INC.

POWER OF ATTORNEY

I, the undersigned officer of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as officer to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Steve Perron

Steve Perron

Senior Vice President and Corporate

Controller (principal accounting officer)

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Alain Bouchard

Alain Bouchard

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ George A. Cope

George A. Cope

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Paule Doré

Paule Doré

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Serge Godin

Serge Godin

Founder and Executive Chairman of the

Board and Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Julie Godin

Julie Godin

Co-Chair of the Board, Executive Vice-President,

Strategic Planning and Corporate

Development and Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Timothy J. Hearn

Timothy J. Hearn

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ André Imbeau

André Imbeau

Founder and Advisor to the Executive

Chairman of the Board and Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Gilles Labbé

Gilles Labbé

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Michael B. Pedersen

Michael B. Pedersen

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Stephen S. Poloz

Stephen S. Poloz

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Mary Powell

Mary Powell

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Alison Reed

Alison Reed

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Michael E. Roach

Michael E. Roach

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Kathy N. Waller

Kathy N. Waller

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Joakim Westh

Joakim Westh

Director

CGI INC.

POWER OF ATTORNEY

I, the undersigned director of CGI Inc., hereby constitute and appoint George D. Schindler and Francois Boulanger, and each of them singly, my true and lawful attorneys with full power to them, and each of them singly, to act on, sign for me and in my name in the capacities indicated below and file with the Securities and Exchange Commission, a Registration Statement on Form S-8, together with all the schedules and exhibits thereto, and any and all subsequent amendments to said registration statement, in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of up to 50,000 Deferred Stock Units of CGI Inc., which may be issued pursuant to the Amended and Restated Deferred Stock Unit Plan for the Board of Directors of CGI Inc. and its Subsidiaries, and generally do all such things in my name and on my behalf in my capacity as director to enable CGI Inc. to comply with the provisions of the Securities Act and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming my signature as they may be signed by my said attorneys, or any of them, to said registration statement and any and all amendments thereto.

/s/ Frank Witter

Frank Witter

Director