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Exhibit 24.1

POWER OF ATTORNEY

The undersigned constitutes and appoints André Imbeau, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute, may lawfully do or cause to be done by virtue hereof.

/s/ Serge Godin Serge Godin
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute, may lawfully do or cause to be done by virtue hereof.

/s/ André Imbeau André Imbeau
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Jean Brassard Jean Brassard
Dated: January 7, 2004

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Paule Doré Paule Doré
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ David Anderson David Anderson
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ William D. Anderson William D. Anderson
Dated: January 6, 2004

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Claude Boivin Claude Boivin
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Claude Chamberland Claude Chamberland
Dated: December 28, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Robert Chevrier Robert Chevrier
Dated: December 25, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ David L. Johnston David L. Johnston
Dated: December 23, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Eileen A. Mercier Eileen A. Mercier
Dated: December 23, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Michael Sabia Michael Sabia
Dated: January 8, 2004

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ C. Wesley M. Scott C. Wesley M. Scott
Dated: January 12, 2004

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Gerald T. Squire Gerald T. Squire
Dated: December 22, 2003

POWER OF ATTORNEY

The undersigned constitutes and appoints Serge Godin and André Imbeau, or either of them, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign and file a registration statement on Form S-8 for purposes of registering equity securities of CGI Group Inc. and any amendments thereto (including any post-effective amendments thereto), and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the foregoing as fully to all intents and purposes as he might or could in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Robert Tessier Robert Tessier
Dated: January 7, 2004

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Exhibit 24.1