I think these two are ultimately incompatible and GC is only a step towards GD.  Masculine and femenine are existencial principles which find expression both in body and mind. A particular body generally expresses only one of this principles (there are edge cases), but a particular mind always has a very variable proportion of both. In the past, for survival reasons, women were rised by societies to be mentally as femenine as possible and men to be as masculine as possible. This of course was done unconciously, such that in the past there wasn't even a conceptual difference beetween "gender" and "sex" like we have today. As technology developed and survival conditions changed, it became no longer necessary for men to be hyper-masculine and women to be hyper-femenine and people are now generally much more balanced regarding these energies, which is a lot healthier than repressing one pole of the spectrum of course. Stereotypes about each biological sex still remain, but it became clear that these are not biological facts but social constructs. That's what allowed us to develop the notion of "genders" as a distinct concept than "biological sex". Society is advancing towards the deconstruction of these stereotypes called "genders", and GC is only an intermediate step which will ultimately be transcended. If a biologically born male happens to have a mind that leans more towards the femenine than the masculine, and he says "I'm a woman in a man's body", he's actually reinforcing these stereotypes. He wouldn't consider himself a woman if it wasn't for his cultural programming. Consider a parallel with the abolition of slavery. GC is the equivalent of having a black person having to legally change his race to "white" in order to be free, because society won't accept him as being black and free. Would you defend this in the XXI century? It would still be an improvement from the previous situation, but we wouldn't glorify it as an ultimate ahievement. Please understand I write this thinking about the next level, not to trash on the achievements we already got