EXHIBIT 5

                                                      June 27, 2001

CGI Group Inc.
1130 Sherbrooke Street West
Montreal (Quebec)
H3A 2M8
Canada

Dear Sirs:

     We have acted as Canadian counsel to CGI Group Inc. ("CGI"), a company
organized under Part IA of the Companies Act (Quebec) (the "Act"), in order to
render this opinion which is included as an exhibit to a Registration
Statement on Form F-4 (Registration No. 333-58116) under the Securities Act
of 1933, as amended ("Registration Statement"), covering an aggregate
70,400,000 Class A Subordinate Shares and any additional Class A Subordinate
Shares (the "Class A Shares") of CGI to be issued in connection with the
merger of IMRglobal Corp. and CGI Florida Corporation, a wholly owned
subsidiary of CGI, pursuant to the Agreement and Plan of Merger dated as of
February 21, 2001 (the "Merger Agreement").

    We have examined such records, certificates and other documents,
including a copy of the resolutions of the Board of Directors of CGI adopted
in relation to the issuance of the Class A Shares, and such questions of
law, as have been considered necessary or appropriate for the purposes of
this opinion.

    Based on the foregoing, we confirm to you that, in our opinion:

       1.    CGI is a company duly organized and validly existing under Part
             IA of the Act.

       2.    All necessary corporate action has been taken by CGI to authorize
             the issuance of the Class A Shares.

       3.    The Class A Shares, when issued in accordance with the terms of
             the Registration Statement and the Merger Agreement, will be
             validly issued and outstanding as fully paid and non-assessable
             shares of CGI.

    We have relied, as to certain matters of fact, on information obtained
from public officials, officers of CGI and other sources believed by us to be
responsible, and we have assumed the genuineness of all signatures, the
authenticity of all documents submitted to us as originals and the conformity
to original documents of all documents submitted to us as certified,
conformed or photostatic copies.

    We express no opinion as to the laws of any jurisdiction other than
the laws of the Province of Quebec and the federal laws of Canada applicable
therein in force on the date hereof.

    This opinion is addressed to you for your own purpose in connection with
the Registration Statement and may not be transmitted or disclosed to or used
by any other person or for any other purposes without our prior written
consent. We hereby give such consent in relation to the filing of this letter
as an exhibit to the Registration Statement. In giving such consent we do not
thereby admit that we are within the category of persons whose consent is
required under section 7 of the Securities Act of 1933, as amended.


                                       Yours very truly,



                                       /s/ McCarthy Tetrault
                                      -----------------------------------------
                                       MCCARTHY TETRAULT