SCHEDULE 14A INFORMATION

                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )

        
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      / /        Preliminary Proxy Statement
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                 BY RULE 14a-6(e)(2))
      / /        Definitive Proxy Statement
      /X/        Definitive Additional Materials
      / /        Soliciting Material Pursuant to Section240.14a-11(c) or
                 Section240.14a-12(c)

                                GSI LUMONICS INC.
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                 (Name of Registrant as Specified In Its Charter)

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             (Name of Person(s) Filing Proxy Statement, if other than
                                  the Registrant)

      

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                                GSI LUMONICS INC.
                               105 Schneider Road
                             Kanata, Ontario K2K 1Y3


                                                                 April 3, 2002

To:  All of Our Shareholders


         Our Annual Meeting is scheduled for May 9, 2002 at 10:00 A.M. at the
Chateau Laurier Hotel, Ottawa, Ontario. Shareholders who are unable to attend
the meeting in person are requested to date and sign the form of proxy enclosed
herewith or the form of proxy previously mailed to you with a copy of our Proxy
Circular and Notice of Annual and Special Meeting of Shareholders, and return it
to Computershare Trust Company of Canada not later than Wednesday, May 8, 2002.
In order to be represented by proxy, you must complete and submit the form of
proxy. If your shares are registered in the name of a broker, only your broker
can execute a proxy and vote your shares and only after receiving your specific
instructions on certain resolutions to be voted upon at the Annual Meeting.
Please contact the person responsible for your account and direct him or her to
execute a proxy on your behalf today.

         If you have any questions or need further assistance in voting, please
call GEORGESON SHAREHOLDER, using their domestic and international toll free
number: 866-214-6816. Please disregard any telephone number for Georgeson
contained in our Proxy Circular.

                                                     GSI LUMONICS INC.

                                                     /s/ Eileen Casal

                                                     Eileen Casal,
                                                     Corporate Secretary