My wife recently wrote an amicus brief from school administrators who had dealt with trans students in the "G.G." case.
Like many of you, it was an issue I hadn't really considered before, but I found reading her brief was pretty educational for me.
For one thing, the educators uniformly stated that adults tend to have a bigger problem with "affirming" policies than students. In the G.G. case, the girls didn't want Gavin Grimm in their bathroom even if he was born with female genitalia. He looks like a guy. Forcing Gavin, and only Gavin, to use the unisex bathroom in the nurse's office is clearly singling him out. Instead, most school systems adopt a policy where any student, for any reason, can use such unisex restrooms. That way, if a boy is freaked out by Gavin using the men's room, that student is welcome to use the unisex bathroom. A clear theme is that many of the concerns that the Gloucester School Board have brought up are hypothetical and have not occurred in school districts with experience accommodating trans students. Many of the administrators who were quoted in the brief learned these lessons from hard experience, sometimes being sued themselves.