On 1 July 1942, when the photograph right was taken, Gerry and Elizabeth Christine Behan, known as Lilli, were married in the Church of Our Lady, Star of the Sea, Saltcoats by Father Michael OConnor. The witnesses were William Hughes and Josephine Behan. Gerry and Lilli were the parents of Gerry, Michael, Brian, Drew and Elizabeth. Lilli died on 6 February 2011.
With his band, the Syncopators, Gerry contributed to the fundraising efforts to build the Church of Saint Peter in Chains. He was the organist in Saint Peters from the early 1950s and to the late 1960s.
Gerry died on the eve of his eightieth birthday, 8 December 1990. He is buried in Ardrossan Cemetery.