The school hasn't identified him as "gifted" but they are providing him with a level of individualization for his academic strengths that are equivalent to what he would get as a gifted identified student.
As a kindergartner, they have moved him to the highest reading group in the first grade for two hours a day, and the gifted specialist is providing one day a week of math instruction (with him and a flexible group of other kindergartners) and consulting with the teacher and the math specialist about what to do on the other 4 days.
They are about to start pulling him and one other kindergartner (who happens to be his best friend and closest intellectual peer) into the first grade gifted group that is focusing on interpreting maps, charts, and graphs.
We had some significant concerns about him from age 3.5-5, but things have really started to settle down into a good groove--he'll be 6 in a couple of months. We looked at sensory issues, we looked at Asperger's, we looked at anxiety. none of them quite fit, but we aren't worried anymore.