You liberals are the victim of your own propaganda. Trump has *always* said that he is okay with gay marriage but that he would be willing to see it overturned by the Supreme Court after he appointed enough conservative judges. He understands that any judge who is pro-gun, pro-business, and pro-life is also going to be anti-gay marriage. He's realistic.
In that same 60 Minutes interview that you're talking about, Lesley Stahl started t to point out to Trump that if he appoints pro-life, pro-gun judges, as he has promised to do, those judges will almost certainly be anti-gay marriage, but Trump cut her off and moved on.
I think both sides are reading too much into Trump's comments in the interview. I think he was just trying to avoid a fight, given how so many gays have expressed "fear" over a Trump presidency.