If I've understood correctly, genes aren't to "blame" for gender dysphoria anyways, since it's probably caused by hormonal exposure during pregnancy - it's neurobiological, but not genetic.
That said, a "cure" that would give me a male personality and identity, and hence remove the need to transition, is something I probably would have wanted a few years ago (except I wouldn't have admitted "needing it" back then). But since then, I've realized that such a "cure" would not only be far more invasive than even a lobotomy; it would constitute murder of personality. I would be someone completely else, probably someone nobody would recognize. If such a treatment is discovered, I think it would soon be outlawed, when people realize the ramifications.
I guess it could be compared to a "cure for autism", as commonly debated on forums for Asperger's and other ASDs. That, too, would more or less kill a person. I would sure want treatment for my sensory oversensitivity and crappy executive function, but the syndrome as such? Of course I have days where I wish I was "normal", but people wouldn't recognize me. So there are serious ethical problems with such treatments.
If researchers ever find a way to alter my sex chromosomes and/or grow new organs (or change the existing ones, if they're still there when/if the breakthrough comes), however, I'd go for it without second thought. I'd probably do it even if there was a significant risk of being killed by the treatment. Too bad it probably won't be an option anytime soon.