I had to re-read your post a few times because I was confused by the question...(because from that first picture I assumed you natally male.) I don't really see anything androgynous about you....perhaps the way your standing in the full length pic might be taken as kinda femmy...maybe....
What I hear more than that though...is that your GF is too close to "the truth" and can't see you beyond that. She knows your past, she's seen you naked (I assume...) and so can't see your passability. That's not a bad thing, or to say anything against her at all...it's just something that people need to be aware of that in themselves. I know that for me, my mate (MtF) can't really pass or not pass with me...I know her all too well. I've seen this whole transition from beginning to current. (can't say "end" because it never really ends...) She'll ask me if she passes on any given day and I truly have no idea. I can't say. She's...her. All I see is her. I can't see male/female pass/no pass.