[Aliantha]

But what concessions are they making? They're informing the parents - which is consideration in my opinion. They're advising the student to use the unisex toilets instead of having to make the choice of boy or girl.

The only concession is to allow him to wear a girls uniform, but even that could be viewed as his right anyway. I doubt you'd find any school specifying that girls have to wear girls uniforms and vice versa for the boys, even though it's implied. So if that's the case, there's really no concession there either.