GSI Group Reports First Quarter Results

      BILLERICA, Mass., May 3 /PRNewswire-FirstCall/ -- GSI Group Inc., (Nasdaq:
GSIG),  a supplier of precision  technology  and  semiconductor  systems,  today
announced financial results for the first quarter 2007.

      Revenue for the quarter ended March 30, 2007 was $74.2  million,  compared
to  revenue of $76.1  million  for the same  period of 2006.  Net income for the
quarter was $3.2 million, or $0.08 per diluted share, compared to net income for
the same period in 2006 of $5.1 million, or $0.12 per diluted share.

      First quarter  operating  profits of $3.8 million  included  proceeds of a
legal  settlement and  restructuring  charges  related to transfer of production
from U.K.  manufacturing  facilities  to our  China  operation.  Together  these
resulted in a net reduction in operating profits of $0.4 million.

      First Quarter Highlights:

      --    Bookings  were $76.9 million and the book to bill ratio was 1.0, the
            second  consecutive  quarter  with a book  to bill  ratio  of 1.0 or
            above.

      --    Semiconductor  bookings  were  driven by  strength  in Wafer  Repair
            Systems due in part to the previously  announced first-time purchase
            by Inotera of GSI's new green-laser  based,  M550 wide-field  memory
            repair systems.

      --    Semiconductor Systems revenue was $31.9 million versus $31.3 million
            in the first quarter of 2006.

      --    Precision  Technology  bookings  were  driven by strength in Optical
            Scanning products and Encoders,  up 50% and 143% respectively,  from
            the first quarter of 2006.

      --    Precision  Technology revenue was $43.6 million versus $47.0 million
            in the first  quarter  of 2006,  primarily  as a result of timing of
            shipments  and softness in the medical  printer and printed  circuit
            board drill product lines.

      --    Cash and cash  equivalents  increased to $147.4 million in the first
            quarter of 2007 from $138.3 million at the end of 2006.

      Dr. Sergio  Edelstein,  President and CEO commented,  "We are pleased with
our gains in the key markets we have previously  identified for growth - Optical
Scanning  products,  Encoders  and Wafer  Repair  systems.  Our strong  bookings
reflect  both  continued  market  strength  and  progress  with our new  product
introductions. We also remain optimistic about overall industry demand."

      The Company anticipates the following for the second quarter of 2007:

      --    Revenue to be in the range of $72.0  million to $74.0  million.  The
            Company anticipates $12-15 million of deferred revenue in the second
            quarter associated with equipment shipments that will materialize as
            revenue in the third quarter upon customer acceptance.

      --    Diluted earnings per share, including  restructuring charges, in the
            range of $0.07 to $0.09 cents.

      --    Restructuring  costs are  expected  to be in the range of  $1.7-$1.9
            million.

      Dial In: May 4th at 8:30 a.m. ET

      GSI Group will host a conference  call for investors at 8:30 a.m.  Eastern
on May 4th.  Participants  are invited to join by dialing (706) 634-5123 with an
access  code:  5340631.  The replay will be  available  for two weeks by dialing
(706) 645-9291 with the replay passcode:  5340631. The conference call also will
be broadcast live over the Internet at http://www.gsig.com.


      Upcoming Analyst Day

      GSI will be hosting  its annual  analyst day on June 5, 2007 at the Hilton
Boston Logan Airport Hotel. It will be held from 8:00am - noon. Attendees should
register at http://www.gsig.com/investors.

      About GSI Group Inc.

      GSI Group  Inc.  supplies  precision  technology  to the  global  medical,
electronics,  and industrial markets and semiconductor systems. GSI Group Inc.'s
common shares are listed on Nasdaq (GSIG).

      Certain  statements  in this news release may  constitute  forward-looking
statements within the meaning of the United States Private Securities Litigation
Reform Act of 1995,  Section 27A of the United States Securities Act of 1933 and
Section  21E of the  United  States  Securities  Exchange  Act  of  1934.  These
forward-looking  statements  may relate to  anticipated  financial  performance,
management's  plans and objectives for future  operations,  business  prospects,
outcome  of  regulatory  proceedings,  market  conditions,  tax issues and other
matters.  All  statements  contained  in this news release that do not relate to
matters of historical fact should be considered forward-looking  statements, and
are generally identified by words such as "anticipate,"  "believe,"  "estimate,"
"expect," "intend," "plan," "objective" and other similar  expressions.  Readers
should not place undue reliance on the forward- looking statements  contained in
this news  release.  Such  statements  are  based on  management's  beliefs  and
assumptions and on information currently available to management and are subject
to risks,  uncertainties  and  changes  in  condition,  significance,  value and
effect.  Other risks include the fact that the Company's sales have been and are
expected  to  continue  to  be  dependent   upon  customer   capital   equipment
expenditures,  which are, in turn,  affected  by business  cycles in the markets
served by those customers. Other factors include volatility in the semiconductor
industry,  the risk of order  delays  and  cancellations,  the risk of delays by
customers in  introducing  their new products and market  acceptance of products
incorporating   subsystems   supplied   by  the   Company,   risks  of  currency
fluctuations, risks to the Company of delays in its new products, our ability to
continue  to reduce  costs and  capital  expenditures,  our ability to focus R&D
investment  and  integrate   acquisitions,   changes  in  applicable  accounting
standards, tax regulations or other external regulatory rules and standards, and
other  risks  detailed in reports and  documents  filed by the Company  with the
United States Securities and Exchange Commission and with securities  regulatory
authorities  in Canada.  Such risks,  uncertainties  and  changes in  condition,
significance,  value and effect, many of which are beyond the Company's control,
could  cause the  Company's  actual  results and other  future  events to differ
materially from those  anticipated.  The Company does not,  however,  assume any
obligation  to update  these  forward-  looking  statements  to  reflect  actual
results,  changes in  assumptions  or changes in other  factors  affecting  such
forward-looking  statements.  For more information contact:  Investor Relations,
978-439-5511, Ray Ruddy, (ext. 6170)



                                 GSI GROUP INC.
                     CONSOLIDATED BALANCE SHEETS (Unaudited)
       (U.S. GAAP and in thousands of U.S. dollars, except share amounts)

                                                       March 30,    December 31,
                                                           2007         2006
                        ASSETS
Current
  Cash and cash equivalents                              $ 147,436    $ 138,315
  Accounts receivable, less allowance of
   $722 (December 31, 2006 - $911)                          59,653       54,546
  Income taxes receivable                                    6,856        5,755
  Inventories                                               71,174       72,703
  Deferred tax assets                                        7,927        7,925
  Other current assets                                       5,495       11,559
    Total current assets                                   298,541      290,803
Property, plant and equipment, net of
 accumulated depreciation of $30,371
 (December 31, 2006 - $28,588)                              33,408       33,511
Deferred tax assets                                         20,136       20,099
Other assets                                                   713          710
Long-term investments                                          744          693
Intangible assets, net of amortization of
 $6,939 (December 31, 2006 - $6,380)                        14,442       14,965
Patents and acquired technology, net of
 amortization of $36,660 (December
 31, 2006 - $35,455)                                        23,044       24,203
Goodwill                                                    26,421       26,421
  Total Assets                                           $ 417,449    $ 411,405

         LIABILITIES AND STOCKHOLDERS' EQUITY
Current
  Accounts payable                                       $  17,092    $  14,002
  Accrued compensation and benefits                         10,461       13,455
  Other accrued expenses                                    15,621       15,846
    Total current liabilities                               43,174       43,303
Deferred compensation                                          668        2,740
Deferred tax liabilities                                    12,357       12,342
Accrued long term restructuring                              1,159        1,141
Income tax payable                                           1,420           --

Accrued pension liability                                    8,847        8,806
  Total liabilities                                         67,625       68,332
Commitments and contingencies
Stockholders' equity
  Common shares, no par value; Authorized shares:
   unlimited; Issued and outstanding: 42,235,689
   (December 31, 2006 - 41,889,804)                        313,395      310,635
  Additional paid-in capital                                 5,696        5,314
  Retained earnings                                         32,339       29,431
  Cumulated effect of adopting FIN 48 -
   Accounting for Uncertainty in Income Taxes                  146
  Accumulated other comprehensive loss                      (1,752)      (2,307)
    Total stockholders' equity                             349,824      343,073
                                                         $ 417,449    $ 411,405



                                 GSI GROUP INC.
                CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)
       (U.S. GAAP and in thousands of U.S. dollars, except share amounts)

                                                           Three Months Ended
                                                         March 30,     March 31,
                                                            2007          2006

Sales                                                    $ 74,204      $ 76,123
Cost of goods sold                                         44,769        44,470
Gross profit                                               29,435        31,653
Operating expenses:
  Research and development and engineering                  7,657         7,454
  Selling, general and administrative and other            14,039        15,004
  Amortization of purchased intangibles                     1,729         1,827
  Restructuring                                             2,414            --
  Other                                                      (161)          (96)
    Total operating expenses                               25,678        24,189
Income from operations                                      3,757         7,464
  Interest and other income, net                            1,535           774
  Foreign exchange transaction gains (losses)                (371)         (709)
Income before income taxes                                  4,921         7,529
Income tax provision                                        1,721         2,425
Net income                                               $  3,200      $  5,104
Net income per common share:
  Basic                                                  $   0.08      $   0.12
  Diluted                                                $   0.08      $   0.12
Weighted average common shares
 outstanding (000's)                                       42,001        41,868
Weighted average common shares
 outstanding for diluted net income per
 common share (000's)                                      42,252        42,524



                                 GSI GROUP INC.
                  Consolidated Analysis By Segment (unaudited)
                           (thousands of U.S. dollars)

                                                         Three Months Ended
                                                         March 30,   March 31,
                                                          2007         2006
Sales:
Precision Technology                                  $  43,625      $  46,978

Semiconductor Systems                                    31,857         31,329

Intersegment sales elimination                           (1,278)        (2,184)

Total                                                 $  74,204      $  76,123

Gross profit %:
Precision Technology                                       35.9%          39.6%
Semiconductor Systems                                      43.6%          41.4%
Intersegment sales elimination                              8.2%          (4.5%)
Total                                                      39.7%          41.6%



                                 GSI GROUP INC.
          Consolidated Sales Analysis By Geographic Region (unaudited)
                           (millions of U.S. dollars)

                                              Three Months Ended
                                      March 30, 2007         March 31, 2006
                                     Sales       % of       Sales         % of
                                           Total                  Total
North America                        $24.1         32%      $21.1         28%
Latin and South America                0.2         --         0.3         --
Europe (EMEA)                         12.8         17        12.0         16
Japan                                 13.8         19        10.7         14
Asia-Pacific, other                   23.3         32        32.0         42
Total                                $74.2        100%      $76.1        100%