This thread is clickbaity bull**** because it implies the proposal is for LGBT people to have their own schools generally.
That is not the proposal, it is to create a single school which will welcome LGBT kids who have struggled in mainstream schools, but will also be open to single mothers and people with mental health issues.
Personally, I think the people proposing this school are about 20 years behind the times. If someone is an ordinary LGBT kid, and given the ever-decreasing levels of homophobia even in schools (I had no problems at school and I was out when I was 15), they'd probably be better off staying in mainstream school than segregating themselves away in a school for people with mental health problems.
Also, this lets the school management off the hook. It's the bullies who should be excluded, not the LGBT kids (if you put it like that, I bet there are some people who are arguing against this who will change their position and argue in favour of it, say "normal" schools shouldn't have to change to accomodate gays).
Funnily enough, in the experience of a few people I know, it was actually the school management / heads who were more homophobic than the students, and they justified their own homophobia with claims about what the students would be like (i.e. "You can't come to the formal with a same-sex partner as you will get bullied" when in fact the students are wholly supportive. Some people are so pathetic if they have to hide behind children to cover their bigotry)