Gayre was born as George Robert Gair on 6 August 1907 in Dublin to Robert William Gair (1875–1957), later of Sprotbrough, Doncaster, South Yorkshire, a pastry baker and confectioner, and Clara Hull or Hart. His younger brother and two sisters retained the spelling of "Gair".
George Robert Gayre was born on August 6, 1907, in Dublin to Robert William Gair (1875–1957), a pastry baker and confectioner from Sprotbrough, Doncaster, South Yorkshire. His younger brother and two sisters retained the spelling of "Gair".