Orthodox Judaism doesn't approve of sexually active gay people, but being gay itself isn't an issue (although there are some very homophobic Orthodox people, mostly those from the Haredi/Hasidic end of the spectrum).
Conservative Judaism ordains gay rabbis, but I can never remember what their position on gay sex is. I don't think they think that's acceptable, but it doesn't really matter because everybody ignores that pronouncement. Or maybe individual rabbis are allowed to accept the liberal tshuva that accepted gay people in all respects.