Your DC's scores are good. WM and especially PS are a little lower, but not totally out of the range for a conscientious/methodical GT kiddo. Sometimes, the lower PS means something concerning, but quite often, it doesn't. In the absence of IRL concerns, I would not think too deeply about the PSI. Do you have concerns?
I agree that the GAI should be interpreted as a better indication of his cognitive capacity than the FSIQ.
I have a hard time imagining any school not qualifying him for gifted services of some sort, with either the FSIQ or GAI, unless his achievement scores are much lower. You mention a discrepancy. Are you comfortable sharing those scores with us?
