I don't think Janna is a G. If she was, she wouldn't need to PM me to save her. Neither would she make impulsive, but risky decisions like voting for Gabe instead of keeping it with Deneb if she was a G.
I also don't think Deneb was a G. No one came to his help, and he wasn't even intent on saving himself despite clear signs that he's top candidate for lynching.