Exhibit 31.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER 
PURSUANT TO RULE 13a-14(a) AND RULE 15d-14(a) OF THE
SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Andrew W. Dorn, Jr., certify that:

|1. | I have reviewed this quarterly report on Form 10-QSB of
    Great Lakes Bancorp, Inc. (the "Company");                                                                                                                                                                                                                                        
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|2. | Based on my knowledge, this quarterly report does not
    contain any untrue statement of a material fact or omit to state a material
    fact necessary to make the statements made, in light of the circumstances
    under which such statements were made, not misleading with respect to the
    period covered by this quarterly report;
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|3. | Based on my knowledge, the consolidated financial
    statements, and other financial information included in this quarterly
    report, fairly present in all material respects the financial condition,
    results of operations and cash flows of the registrant as of, and for, the
    periods presented in this quarterly report;      
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|4. | The small business issuer's other certifying officer and
    I are responsible for establishing and maintaining disclosure controls and
    procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for
    the small business issuer and have:                                                                                 
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May 11, 2005



/s/ Andrew W. Dorn, Jr.
Andrew W. Dorn, Jr.
President & Chief Executive Officer