First of all no doctor would be operating on any minor without parental consent, that's the law through each of the 50 states, just because Republicans lie about it doesn't make true.
Second of all of someone doesn't feel ok with the gender they were born NO ONE should have a saying over that person's decision to change it and for that they need accommodations no different as when slavery was abolished and women were allowed to participate on everything men does, making accomodations for all types of people, gender, color and race.