HI Gary, I, too, have been doing Gleason research and thought I would see if I could help you out.
Here is what I found and double check to make sure it is true. This will be close if your mother's name is Thelma, if not, then please give me her name to include maiden if you know it and I will look again at the records online.
John Martin Gleason b. Oct. 13, 1934 d. Aug. 11, 1965 father: William Gleason b.abt 1902 in Iowa mother: Beulah A. Gravin b. abt 1909 in South Dakota sister: Phyllis Gleason b. abt. 1928 in Minnesota
Does any of this sound close? I have saved in my files the 1930 census and John Martin Gleason social security number from his death records for you to check. His social security card was issued in 1952 in Michigan if you want to get a copy. It should have his parents names on it to check what I have put above.