I do not see the sense of the gay marriage. Not from the church point of view at list. In such case poligamy should be accepted as well by the church. In that case crhistian churches would loose a big chunk of it institutionality.
Religions are not democracy that changes with times, people does not undertand that. A religion is one thing created by a person or a groud of them and that is it.
I understand why a gay couple would like to marry, is an impulse of feeling even closer to each other. But is not God related so far until some one discovers some sort of document written by the apostols or something but that is just Sci-Fi.
Is like (as a friend of mine was suggested the other day) to take the motorbike to the carwash