NSGHS > HGHS > SGGHS
Nsg has more opportunities, with a lot of events that students can participate, along with lots of emphasis on rep sport, so morning trainings, spending actual money on jerseys and they have events such as Games Day, Trivia Night, Senior Dance and whatnot.
I'm not too sure about HGHS but from what I've heard, it's a prestigious school so I assume their facilities are top notch with blooming girls.
SGGHS seems a lot more lenient with sport but they also have a lot of opportunities like Cook Offs with other high schools.
However, student-wise; I'm going to say it's HGHS > NSGHS > SGGHS
Arrogance-wise anyways.
But from what I've heard, NSGHS playground is super small (most likely bc it's in a more expensive area hence)