FAIRFAX, VA, Dec. 19, 2017 - CGI (NYSE: GIB) (TSX: GIB.A) announced that it has been awarded a place on the Alliant 2 Indefinite Delivery/Indefinite Quantity (IDIQ) Government-Wide Acquisition Contract (GWAC) by the U.S. General Services Administration (GSA). Alliant 2 carries a $50 billion ceiling with a 10-year ordering period (5 base years and one 5-year option). Designed to be flexible to the government's ever-evolving needs, Alliant 2 will provide all federal agencies access to integrated information technology (IT) solutions, enabling their continued digital transformation over the next decade. Alliant 2 is a follow-on to the Alliant GWAC (set to expire in April 2019) on which CGI has been a top performer among the contract holders over the past 10 years.

"CGI is honored to be selected by GSA for continued successful delivery of IT and managed services solutions to our federal clients on the Alliant 2 vehicle," said CGI Federal President Tim Hurlebaus.

Services to be provided under Alliant 2 will include all components of integrated IT solutions, such as infrastructure, applications and IT management services, including such CGI proprietary solutions as Momentum® Financial Management and Momentum Contract Writing. All current and any new technologies which may emerge during the term of the contract are covered under Alliant 2, which also features scope improvements, new IT service labor categories, new cybersecurity standards and new environmental standards.

According to GSA's GWAC Dashboard, the existing Alliant vehicle has grown significantly over past few years, with agencies spending roughly $3.8B in Fiscal Year (FY) 2014, $4.1B in FY15 and nearly $4.7B in FY16. Alliant's largest customers include the Department of Defense, the Department of Homeland Security and the U.S. Department of State.

About CGI Federal
CGI Federal Inc. is a wholly-owned U.S. operating subsidiary of CGI Group Inc., dedicated to partnering with federal agencies to provide solutions for defense, civilian, healthcare and intelligence missions. Founded in 1976, CGI Group Inc. is the fifth largest independent information technology and business process services firm in the world. With approximately 71,000 professionals worldwide, CGI delivers an end-to-end portfolio of high-end IT and business consulting services, systems integration and IT and business process outsourcing services. CGI's client proximity model, best-fit global delivery network, and intellectual property solutions help clients accelerate results and digitally transform their organizations. With annual revenue of C$10.8 billion, CGI shares are listed on the TSX (GIB.A) and the NYSE (GIB). 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 Section 27A of the United States Securities Act of 1933 and Section 21E of the United States Securities Exchange Act of 1934, as amended, and are "forward-looking information" within the meaning of Canadian securities laws. These statements and this information represent CGI'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 or forward-looking information. These factors include but are not restricted to: the timing and size of new 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 or incorporated by reference in this press release, in CGI's annual and/or quarterly Management's Discussion and Analysis and in other public disclosure documents filed with the Canadian securities regulatory authorities (on SEDAR at www.sedar.com) and the U.S. Securities and Exchange Commission (on EDGAR at www.sec.gov), 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 or forward-looking information, which speak only as of the date on which they are made. In particular, statements relating to future performance are forward-looking statements and forward-looking information. CGI disclaims any intention or obligation to publicly update or revise any forward-looking statements or forward-looking information, whether as a result of new information, future events or otherwise, except as required by applicable law. Readers are cautioned not to place undue reliance on these forward-looking statements or on this forward-looking information.

For more information:

Lorne Gorber
Executive Vice-President, Global Communications and Investor Relations
+1 514-841-3355

Jennifer Goodman Horowitz
Director, Communications
+1 703-227-4636