The bible (and i think the book of Mormon) says that marriage is between a man and a woman, and i don't think it says you'll go to hell if you do otherwise. But i really don't care about them marrying, you should be with the one you love.
Im pretty much fine with gays.
Cept you chriz i hate your guts! 
I think it says the people in the city of Sodom went to hell, and they were all homoloveual. There was some sort of typo that made people assume that gay people go to hell.
I don't know much about the story, but I think it's a translation typo.
Also, my neighbor is gay, and he's really cool. The only way you'd notice is he lives with another man :o