I know there are plenty of polls in regards to gay marriage, but I don’t ever see them broken out by religious attitudes. So I looked at the GSS at the MARHOMO, “Homosexuals should have right to marry,” variable for 2008. I then cross-referenced with the “GOD” variable, which asks people about their confidence in the existence of God. The trendlines are as you would expect, but there is more diversity of belief than I suspect many would have assumed.
Compare to Age: