He has a lot of gay friends. He's probably the least homophobic GOP nominee ever.
lol
There is nothing to LOL about. Trump could have used the LGBT issue to excite evangelicals and win the nomination that way. Instead, he chose not to, because he genuinely supports marriage equality, and instead went after immigrants and Muslims, who he either does not like and/or the insulting of whom he used to win the nomination.
LGBT issues don't excite nearly as much passion for conservatives as they used to. Mike Huckabee milked the Kim Davis thing for all it was worth, and he didn't seem to gain any mileage out of it. Cruz went after Trump hard on the Transgender Bathroom Issue the week before the Indiana Primary, and he still lost. Of course Trump cares only about his money and power, so he would certainly have attacked the LGBT community had it been politically expedient for him to do so, but it wasn't.