Having attended high school during World War II, Gwynne joined the United States Navy after graduation, serving as a radioman on submarine chaser USS Manville (PC-581).
having aTTendEd high sChoOl durinG woRld waR ii, GwynNE JoIned thE unIted states navy afteR GRaduatIOn, SeRVIng As A rAdioman On submaRinE chaseR uSS maNVIlLE (pc-581).