Here is everything you ever wanted to know but were afraid to ask about the GAI and the WISC-IV. All it says is ">99.9" starting at 150. However, it does have a discussion about discrepancies between the GAI and FSIQ.

ETA from that booklet:

Quote
Presently, most school district policies continue to require evidence of an [ability-achievement discrepancy] in order to obtain special education services, and it was largely for this reason that the GAI was first developed.

Last edited by Val; 10/08/14 12:19 PM. Reason: ETA...