<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>a2051290zex-23_1.txt
<DESCRIPTION>EXHIBIT 23.1
<TEXT>

<PAGE>
                                                                    EXHIBIT 23.1

                [LETTERHEAD OF SAMSON BELAIR DELOITTE & TOUCHE]

INDEPENDENT AUDITORS' CONSENT

    We consent to the use in this Registration Statement of CGI Group Inc. on
Form F-4 of our report dated November 7, 2000 (except for Notes 7 a), 15 a) to
f), and 17 which are dated June 7, 2001) appearing in the Prospectus, which is
part of this Registration Statement.

    We also consent to the use in this Registration Statement of CGI Group Inc.
on Form F-4 of our report on Comments for United States Readers on reporting
differences between Canada and the United States dated June 7, 2001 with respect
to our report dated November 7, 2000 (except for Notes 7 a), 15 a) to f) and 17
which are dated June 7, 2001) referred to above.

    We also consent to the reference to us under the headings 'Experts' in the
Registration Statement.

                                          /s/ SAMSON BELAIR/DELOITTE & TOUCHE
                                          Chartered Accountants

Montreal, Quebec
June 7, 2001
</TEXT>
</DOCUMENT>
