After doing a little more digging, I'm convinced he's far more likely to be G4P and the whole bi/pan/gay-but-not-really-gay thing is just part of his fictional porn persona. His scenes with men are mostly just intense fucking, and he seems far more into the act itself—and the camera—than he does the man or men he performs with. In his scenes with a woman (yeah, that woman in particular, who he calls his "work wife"), he's clearly very attracted to her and totally into her. In MMF scenes, he's far more into her than the other guy and is constantly all over her. They apparently travel together and she often appears in his Twitter feed, so it's possible they're a couple in real life. Even another performer in the biz called them a "porn star couple."
So yeah, I'm pretty convinced he's G4P.