I guess it depends on a lot of factors. What's the age of the kids?

Not all the letters are the same in LGBTQIA.

Lesbian cis gender daughter? Northampton. Tour Smith and Mt Holyoke, you might see NoHo resident Rachel Maddow. Our new governor is a lesbian.

Gay male? Boston has BAGLY for kids. PFLAG for parents. Provincetown when they get old enough to enjoy it.

Harvard and Somerville Sq have a lot of trans activism. I don't know if this is still true, but a few years back Jamaica Plain was like the most trans area regionally.

Kids just like to be kids. They'll find friends in school. Roxbury can be pretty hostile to young gay kids. But Dorchester is a bit more gentrified than it used to be. There's a weird gay oasis there (Near DBAR) in the middle an urban hellscape.