Ah, but this doesn't mean a great deal if everyone is using these terms to mean different things.
Being a woman is an important part of my identity but it is sex based, not gender based. I can't think of a single way in which womanhood forms a part of my identity which isn't directly related to my female biology. As such, I don't feel that I have a gender identity and although I accept that others do, I don't really understand what one is.
I have no idea what trans women are identifying with but I am crystal clear about the fact that we don't share any kind of identity.
I'm extremely wary of any attempt to say that we all have a gender identity because this leads us back down the path of women and trans women being considered a coherent grouping, which in my view it isn't.