EXHIBIT 99.1 CERTIFICATION PURSUANT TO SECTION 906 OF SARBANES-OXLEY ACT OF 2002 I, Dennis E. Gershenson, President and Chief Executive Officer of Ramco-Gershenson Properties Trust (the "Company"), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: 1. The Quarterly Report on Form 10-Q of the Company for the period ended March 31, 2003 which this certification accompanies fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Dennis E. Gershenson - ------------------------ Dennis E. Gershenson President and Chief Executive Officer May 12, 2003 1