EX-99.906 CERT

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Scott Eston, Chief Executive Officer of GMO Trust (the “Registrant”), certifies to the best of his knowledge that:

1.     The Covered Series of the Registrant’s periodic report on Form N-CSR for the period ended February 28, 2006 (the “Form N-CSR”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.     The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Covered Series of the Registrant.

/s/ Scott Eston
Scott Eston
Chief Executive Officer
Date:	May 17, 2006

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906 has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission (the “Commission”) or its staff upon request.

This certification is being furnished to the Commission solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Form N-CSR with the Commission.

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Susan Randall Harbert, Principal Financial Officer of GMO Trust (the “Registrant”), certifies to the best of her knowledge that:

1.     The Covered Series of the Registrant’s periodic report on Form N-CSR for the period ended February 28, 2006 (the “Form N-CSR”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.     The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Covered Series of the Registrant.

/s/ Susan Randall Harbert
Susan Randall Harbert
Principal Financial Officer
Date:	May 17, 2006

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906 has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission (the “Commission”) or its staff upon request.

This certification is being furnished to the Commission solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Form N-CSR with the Commission.