One thing I'm confused about is whether the GAI is scaled separately or is supposed to be comparable to an FSIQ (factoring out certain things, of course). The Hoagie's site aligns FSIQs with significantly higher GAIs so that it's almost like it doesn't change anything in terms of where the kid is on the 'giftedness spectrum.' The WISC technical reports from what I remember didn't directly comment on this, but maybe it was supposed to be understood....??