I lived in south Louisiana for several years and that is about as humid as you can get. The house I was in did not have central air and you could see the ground between several of the floor boards so it was as humid inside as it was outside. My cheepo Sigma that I had then never had any damage so I doubt a glock would be damaged by about the same humidity levels as long as it sees some gun oil occasionally.
Donít go around saying the world owes you a living. The world owes you nothing. It was here first. ĖMark Twain