My therapist isn't a "gender therapist" per se, from the way I read her credentials, although I know of at least several other transfolk who employ her services to some degree or other.
The fact that I'm transitioning plays some role in our sessions, although my general well-being seems to be of far greater significance than trans issues.
If you, like me, have the good fortune of establishing some relationship with a therapist who can treat you as a whole human being who happens to be trans, and doesn't see your trans-ness as a "problem" to treat, then you may benefit quite a bit.
Shopping around for such a gem, however..... Well, that can be a puzzle in itself.