98th percentile is considered to be 2 standard deviations above average (or a scaled score of 130). 99.9th percentile is considered to be 3 standard deviations above average (or a scaled score of 145). It sounds like your daughter tested solidly in what most consider the "moderately gifted" range. A GAI in the 99th percentile is somewhere in the middle of that range.
Can you get more test details? We found the psychological write-ups to be very helpful.
Anyways, those are great scores! It must be a huge relief to you to have your suspicions validated by a standardized test (I know it was for us).
