Well most of what I've learned is from my English teacher when we did a unit on Native American and a few posts on tumblr which I sadly can't recall. But I've google some stuff you can look at if you'd like!
http://www.outhistory.org/wiki/Native_Americans/Gay_Americans_1528-1976
http://www.gay-art-history.org/gay-history/gay-customs/native-american-homosexuality/two-spirit-native-american-gay.html (this one seems really good)
http://plainshumanities.unl.edu/encyclopedia/doc/egp.gen.026 (gender roles)
http://en.m.wikipedia.org/wiki/Gender_roles_in_First_Nations_and_Native_American_tribes (under Iroquois)
Hope this helps!