All the prominent gay characters were killed off in the television show. And the books definitely showed they were gay -- it's just not in your face because Martin employs subtle narrative techniques.
I’m pretty sure that the only gay characters in the books were Renly and Loras, and their homosexuality was never directly addressed, only vaguely hinted at, which was fine. Maybe there were others, but if so they were so subtle I can’t even remember them.
The TV show is over the top with it, and I definitely think it’s pitiful.
It’s like they have some fairy floating around on the set in winged slippers waving a gay wand at whatever while saying put more gay in it.