Trip, your child sounds very similar to mine. Her old school did the MAP testing beginning in kindergarten and she scored off the charts every time she took the test. We didn't find out just how well she had done until winter conferences when they showed us the results and had the principal join us to explain our options. At that school, the options were fairly limited. They did give us the option of subject acceleration for both math and reading, or whole grade acceleration. They did not however have a gifted/talented program in place (it was being developed). We ended getting her into a 1st grade math class for the 2nd half of the year, and she did very well. For this school year (1st grade), we switched to another school district that had a much better program for GT kids and was also willing to build her class schedules around where she needed to be in regard to math, reading and GT time. She has been in a 2nd grade advanced math class this year and has done very well. She just took the spring MAP test, and scored 212 which is high end for 2nd graders. For a first grader, her score is off the charts. So your child with a comparable score should be at minimum accelerated a year in math. I'd have to imagine that if he scored that well and he isn't in a higher math class, that he is bored to death and losing interest. My daughter's school starts their GT program in 1st grade. We had contacted the GT coordinator when we enrolled there, and explained our daughter's talents and needs and they were ready for her when school started. They tested her and placed her in 3 different GT pull-out groups. Initially, it was only her and 2 boys that were in 2nd grade. As the school year progressed, they identified more kids that qualified for the program, and her groups have grown to generally around 8 or 9 kids, some 2nd grade and some 1st grade. We had looked at a magnet school for GT kids, and they didn't start their program until 2nd grade, so it was nice for her to have these opportunities as a 1st grader.
