None of them are gay, there isn't anything wrong with being gay either way...though people do ship them as bromances. Bromances are when people like them as brothers, sort of in a relationship. Larry Stylinson is the most popular bromance. I ship Larry and Ziam the most. ^_^
Zayn is currently in a relationship (with Perrie Edwards of Little Mix) along with Louis and Liam who are dating Eleanor Calder (a student at Manchester Univesity) and Danielle Peazer (a dancer) though both Harry and Niall are still single.
I think you don't understand. Calling somone gay isn't insulting them. It's just stating what their sexual orientation is. There's nothing wrong with being gay. Harry is still the same Harry, he just likes boys. I love Harry, and I love every part of him. That means that I love him even if he loves boys. Being gay doesn't change a person, and me thinking he is gay doesn't mean I dislike him. I love Harry.
Ok look none of them r gay ok Harry isnt gay ..Louis isnt gay..Niall isnt gay...Liam isnt gay... and Zayn isnt gay .. what is wrong with u people and saying "which one is gay" .. "omg 1D is gay" WTF!!!! there not gay