Son of John G. and Christianna M. Gaynor, of Johannesburg, Transvaal, South Africa.
DFC LG Sup 23 April 1943 pg. 1856 - "This officer is a fearless and resourceful fighter. He has led the squadron on many occasions, setting a most inspiring example. Captain Gaynor has destroyed at least four enemy aircraft, two of them on his first operational flight" MID LG Sup 1 January 1945 pg. 104