I've also been accepted to the grad program at GSA, and only have there website info with few outside perspectives.
Their program has no classes involved. You have 4-5 graduate advisors/tutors and several visiting tutors, studio space, and a strongly research-based structure. There seems to be a highly stimulating community with a promotion of the interdisciplinary practice and great resources.
The choice is between Glasgow and SFAI in New Genres. My work is video/documented performance/sculpture, etc.
If anyone has advice it would be greatly appreciated!