Andover, Massachusetts, January 4, 2006

Medco Health Solutions, Inc., one of the nation’s leading pharmacy benefit
managers, selected CGI Group Inc. (CGI) (TSX: GIB.SV.A; NYSE: GIB), one of the
largest information technology and business process services firms in the world,
to provide payment, reconciliation and enrollment form processing services for
YOURx PLAN™, Medco’s nationwide Medicare prescription drug plan (PDP).

As part of this multi-year contract valued between US$30 and $40
million, CGI will perform member billing, Medicare payment reconciliation,
enrollment form processing, and IT hosting services for DTraq, the software
solution developed by MMC 20/20 Systems, Inc. that is used by Medco for the
billing and reconciliation. To meet the demands of this contract, CGI will be
hiring over 50 business and IT professionals in Fort Worth, Texas.

“We
are extremely excited about our new relationship with Medco and building our
healthcare billing practice. Over the years, we have built a noteworthy
reputation for our billing solutions and expertise. As Medco’s needs evolve and
change in accordance with this new government program, we’ll be there to adapt
and adjust accordingly,” said Karen Furtado, vice-president of CGI Insurance
Business Services.

CGI employs professionals across North America
dedicated to the healthcare sector. Services beyond the full end-to-end IT
offerings include; managed care solutions, a healthcare adapted ASP solution and
HIPAA compliance and bioinformatics. Clients include provincial and federal
healthcare organizations, regional boards, teaching hospitals and HMOs. During
the past decade, CGI has delivered industry-leading solutions to more than five
hundred hospitals, health systems and other healthcare providers, as well as
health insurers, managed care companies and government payers. To learn more,
please visit the healthcare section of www.cgi.com.

About
CGI

Founded in 1976, CGI is the 8th largest independent IT services
company in the world. CGI and its affiliated companies employ approximately
25,000 professionals. CGI provides end-to-end IT and business process services
to clients worldwide from offices in Canada, the United States, Europe, Asia
Pacific as well as from centers of excellence in India and Canada. CGI’s annual
revenue is currently CDN$3.7 billion (US$3.0 billion) and at September 30, 2005,
CGI’s order backlog was CDN$12.9 billion (US$11.1 billion). CGI’s shares are
listed on the TSX (GIB.SV.A) and the NYSE (GIB) and are included in the
S&P/TSX Composite Index as well as the S&P/TSX Capped Information
Technology and MidCap Indices. Website: www.cgi.com.

Forward-Looking
Statements

All statements in this press release
that do not directly and exclusively relate to historical facts constitute
“forward-looking statements” within the meaning of that term in Section 27A of
the United States Securities Act of 1933, as amended, and Section 21E of the
United States Securities Exchange Act of 1934, as amended. These statements
represent CGI Group Inc.’s intentions, plans, expectations, and beliefs, and are
subject to risks, uncertainties, and other factors, of which many are beyond the
control of the Company. These factors could cause actual results to differ
materially from such forward-looking statements.

These factors include
and are not restricted to the timing and size of contracts, acquisitions and
other corporate developments; the ability to attract and retain qualified
employees; market competition in the rapidly-evolving information technology
industry; general economic and business conditions, foreign exchange and other
risks identified in the Management’s Discussion and Analysis (MD&A) in CGI
Group Inc.’s 2004 Annual Report or 2004 Form 40-F filed with the SEC, the
Company’s 2004 Annual Information Form and in the Company’s MD&A for the
fourth quarter of 2005 filed with the Canadian securities authorities, as well
as assumptions regarding the foregoing. The words “believe”, “estimate”,
“expect”, “intend”, “anticipate”, “foresee”, “plan”, and similar expressions and
variations thereof, identify certain of such forward-looking statements, which
speak only as of the date on which they are made. In particular, statements
relating to future performance are forward-looking statements. CGI disclaims any
intention or obligation to publicly update or revise any forward-looking
statements, whether as a result of new information, future events or otherwise.
Readers are cautioned not to place undue reliance on these forward-looking
statements. .

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For more
information:

CGI:
Investor relations
Lorne Gorber

Vice-president, investor relations
Lorne.gorber@cgi.com
(514)
841-3355

Ronald White
Director, investor
relations
Ronald.white@cgi.com
(514) 841-3230

Media relations

Eileen Murphy
Director, media relations

eileen.murphy@cgi.com
(514) 841-3430