In the past 500 dreary years, some Native American (US and Canada) groups became very fundamentalist Christian. But if a particular group dodged that bullet, they can frequently be very gay friendly-- often from the perspective that society likes to make life hard for all us minority groups, so let's not do that *to each other* too. If their culture and society haven't yet been totally beat down, then people have healthy respect and kindness for people as individuals-- and if someone finds love, and it happens to be with someone of the same gender, well good for them! (And if it happens that some Church Lady doesn't like gay people, someone often takes her aside and explains the merits of divine fellowship that can be best achieved by them adhering to a highly introspective theology of STFU.)
Source: I've been around!