As we all know, crossdressers fall in to three general levels (subdivided in to as many groups as you like).
Those who do it a little of the time for fun.
Those who do it as a need but will remain male.
Those who are or will transition.
How your crossdressing effects the woman to be involved depends on where you fall in these levels.
If you are doing it a little for fun then she may consider it fun. But if you are doing it by need or transitioning fits in there somewhere then her response could be quite different.
So perhaps you should advise us of your crossdressing intentions so we can better advise.
But regardless, how would you feel if you were a GG dating a guy and after a while, he reveals his secrets, perhaps after you become involved. As a human being you owe any woman you anticipate a potential relationship with the common courtesy of honesty and respect. Maybe not on the first date, but certainly by the time it hots you that this GG could become my SO.