Definition of "gawd"

There's his right arm over there, and his backOh, my gawd!

1917, H. C. McNeile, No Man's Land‎

A guy nearby gushed, "Oh my gawd, look at the size of this peanut!" and that was as excited as anyone got all afternoon.

2006 September 15, Ted Cox, “Lovable Losers and the Lovable Losers Who Love Them”, in Chicago Reader‎