I do believe that the GAI can be used as an overall IQ score, if any administrators care about that "overall IQ" number. It's particularly important in your case to not use the FSIQ (in fact, it wasn't even reported it looks like).
Even so, you're talking about a rarity of 1 in 1,500 (maybe two or three of these kids in the entire school district across all grades) and 1 in 5,000 (two or three of these kids across all grades from several school districts). That should get you some sort of acknowledgment from the district that they don't see very many kids at these levels at all, so that they inherently might not be as equipped to meet their needs.
Last edited by George C; 05/21/15 08:36 AM.
