The following schools and service groups are planning reunions: Maryland

The Gaithersburg High School class of 1961 is planning a 20-year reunion Aug. 2. For information, call Sharon Bohrer at 869-1060.

Glen Burnie High School class of 19711 will hold a 10-year reunion Oct. 10 at The Forum. For information, call 796-1634 or 525-1333.

Kensington's Holy Redeemer School is celebrating its 30th anniversary Sept. 27 with a mass and reception. A reunion dance will be held Sept. 26. Graduates are asked to send their name, address and year graduated, in an envelope marked 30th Anniversary, to Holy Redeemer School, 9715 Summit Ave., Kensington, Md. 20795. District of Columbia

The Roosevelt High School class of 1961 will hold its 20th reunion June 26-28. For information, call Marshall Callender, 622-4560.

The McKinley High School class of 1961 is planning a 20-year class reunion. Graduates are asked to send their name, address and telephone number to Vernelle McIntosh Wiseman, 6312 Westmoreland Ave., Takoma Park, Md. 20012 or call her at 270-4771. They may also call Jean Tracey Robins in the evenings at 526-2983. Other Places

The New Rochell (New York) High School class of 1931 is seeking names and addresses of its members for a 50th reunion Oct. 24 at the Sheraton Plaza Inn of New Rochelle. Contact the secretary at New Rochelle, High School, 265 Clove Rd., New Rochelle, N.Y., 10801 or call 914-632-9000, extension 441.