They are always supportive at first.
My last girlfriend does not know my old name (yes I live this full time), had seen only "Erin" for a while, and were fine for a couple months. Eventually she was trying to get me to live as a man.
The pattern is always the same for TG - their GG lover is accepting at first but that never lasts.
I will send a PM with further details about how that goes. Nothing X rated by any means, just not something I can talk about in the open.