Mahar's a smug dude. But put that aside for the moment.
It's not the gay part of his comments that are alarming; it's the part where he comments on the GOP's collective anti-abortion stance. In an attempt to demonstrate his intellect and deal the party a blow, he goes on to say in the ‘you-tube’ video post:
"It's so ironic, Republicans, the anti-abortion party, always trying to kill something inside of themselves"
Given that killing is involved, is Mahar talking about partial birth Republicans, or perhaps, third trimester Republicans? Safe to say he's not referring to embryonic Republicans.
I think you misunderstood. Maher was referring to gay Republicans who remain in the closet and attack positions deemed by liberals as anti-homosexual (like support for gay marriage).
In a way, he could be right. Whatever you think about homosexuality, it can't be healthy to have to keep hiding the truth about your nature from everybody and always being in fear of being found out. Just think of the toll it must have had on Ted Haggard all these years.