Hi Helen.Since you mentioned this, I have been in a situation before where I saw a GG, but she was dressed in attire that most men in my area would wear..... She was wearing denim overalls and a white t-shirt with a ball cap, she wasn't wearing makeup and her hair was very short. I saw this person a few years ago at a karaoke bar that I went to once. It was kind of dark in there and I referred to the person as "him". SHE corrected me and I apologized to her but in that setting, as dark as it was in that bar and with her pretty much dressed like a man with short hair and no makeup, I sincerely thought she was a man..... Turns out, she was a butch lesbian and I hope that term doesn't offend anyone because I'm certainly not trying to offend people here. LOL
But my point is, sometimes it can be unclear as to the person's gender whom you're seeing or conversing with.