Exhibit 31.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER PURSUANT TO RULE 13a-14(a) AND RULE 15d-14(a) OF THESECURITIES 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"); |
|                                  |   |
| 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; |
|                                  |   |
| 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; |
|                                  |   |
| 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: |
|                                  | (a) | designed such disclosure controls and procedures, or caused such      disclosure controls and procedures to be designed under our supervision,      to ensure that material information relating to the small business issuer,      including its consolidated subsidiary, is made known to us by others      within those entities, particularly during the period in which this      quarterly report is being prepared; |
|                                  |   |   |
|                                  | (b) | evaluated the effectiveness of the small business issuer's disclosure      controls and procedures presented in this report our conclusions about the      effectiveness of the disclosure controls and procedures, as of the end of      the period covered by this report based on such evaluation; and |
|                                  |   |   |
|                                  | (c) | disclosed in this report any change in the small business issuer's      internal control over financial reporting that occurred during the small      business issuer's most recent fiscal quarter (the small business issuer's      fourth fiscal quarter in the case of an annual report) that has materially      affected, or is reasonably likely to materially affect, the small business      issuer's internal control over financial reporting; and |
|                                  |   |
| 5.                                    | The small business issuer's other certifying officer and I  have disclosed, based on our most recent evaluation of internal control over  financial reporting, to the small business issuer's auditors and the audit  committee of the small business issuer's board of directors (or persons  performing the equivalent functions): |
|                                  |   |   |
|                                  | (a) | all significant deficiencies and material weaknesses in the design or      operation of internal control over financial reporting which are      reasonable likely to adversely affect the small business issuer's ability      to record, process, summarize and report financial information; and |
|                                  |   |   |
|                                  | (b) | any fraud, whether or not material, that involves management or other      employees who have a significant role in the small business issuer's      internal control over financial reporting. |

August 12, 2005

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