[BLAKE, CASSELS & GRAYDON LLP LETTERHEAD]

February 11, 2003



Geac Computer Corporation Limited
11 Allstate Parkway
Suite 300
Markham, Ontario
L3R 9T8

Dear Sirs, Mesdames:

      RE:   REGISTRATION STATEMENT ON FORM S-8 RELATING TO CERTAIN OPTION PLANS

      Reference is made to the above-captioned Registration Statement on Form
S-8 (the "Registration Statement") filed by Geac Computer Corporation Limited
("Geac") under the Securities Act of 1933 relating to the registration of an
aggregate of 6,561,597 common shares of Geac (the "Shares") issuable on the
exercise of options granted pursuant to the Geac Stock Option Plan V and Geac
Stock Option Plan VI (collectively, the "Plans") filed as exhibits to the
Registration Statement.

      We have examined and have relied as to factual matters solely upon copies
of the Plans, and certified copies of the currently effective articles and
by-laws of Geac, certified resolutions of the Board of Directors of Geac and
originals or certified copies of such other documents, certificates, instruments
and proceedings as we have deemed necessary or advisable as the basis for the
opinions expressed below without independent verification of the accuracy
thereof.

      For the purposes of this opinion, we have assumed the genuineness of all
signatures, the legal capacity of all individuals, the authenticity of all
documents submitted to us as originals and the conformity to the originals of
all documents submitted to us as certified, conformed or photostatic copies or
electronically transmitted copies or facsimiles thereof.

      The opinions hereinafter expressed are limited to the laws of Ontario and
the laws of Canada applicable therein. We assume no obligation to revise or
supplement this opinion should applicable laws of any jurisdiction be changed
subsequent to the date hereof by legislative action, judicial decision or
otherwise.

      Based on the foregoing, we are of the opinion that the Shares have been
duly authorized and, when issued and paid for in accordance with the terms of
the applicable Plan providing for such issuance of and payment, will be validly
issued as fully paid and non-assessable.

                                    * * * * *

      We are furnishing this opinion in connection with the filing of the
Registration Statement with the Securities and Exchange Commission and this
opinion is not to be used, circulated, quoted or otherwise referred to for any
other purpose without our express written consent.

      We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to our firm name set forth under the
caption "Interests of Named Experts and Counsel" in the Registration Statement.

                                    Yours truly,


                                    /s/ Blake, Cassels & Graydon LLP

                                    Blake, Cassels & Graydon LLP