While I do understand that gayness in religion is wrong, I do not understand why does gay people want to get married in church. I'm not really that old to know (or that willing to google it...) but you don't need to have wedding in church, you can just register you and your partner as married.
I know that gay people can be religious or not, but you don't need to be part of a religion to embrace God or what ever your religion might be like. Think for yourselves. All of the religions are made up by people, so why shouldn't the other people who are in this religion not effect it? God never will say what is wrong. If you make somebody unhappy because their interest in sex is different, it's sad. But humans are stupid. People won't just change their religion. So why not be the smarter one and actually think for yourselves.
Conclusion (TL,DR): Gay people don't need to get married in church, you can still be religious even though you are gay and not 'in' church.