That's wonderful, Vivian ... congratulations!But, I'm not surprised. lol. There are a great many more GGs who are accepting than people imagine, especially if they are on the dating scene in their 40's or 50's. It's an entirely different matter than a GG who finds out about the CDing after having been married to her husband for years.
A word of caution, and this is based on my own experience. It's important to be honest, as you have been, but be careful to not minimize the extent of your desires and spring things on her bit by bit. This might lead her to believe that you are headed for far more than you actually are.
If you enjoy going out several times per week and this is important to you, don't lead her to believe that you only dress rarely. Or only privately. If you have femme profiles on social sites, disclose them to her early. And if you do identify as more than "just a regular guy who occasionally enjoys getting in touch with a female side", tell her this as well. If there is anything about your appearance that you are currently considering changing, tell her about this now as well.
It is when things start to change after the relationship becomes established that spooks many GGs, and this may even turn them off. But if they are clear from the onset about your desires and how the CDing fits into your life, there will be no surprises down the road and the gf won't eventually question her own role in your relationship.
I wish you both the best, and I do hope your relationship reaches its full potential.
