I don't know what sort of gifted programs your school district has in place or is developing, but ours is average and doesn't start until 4th; they try to use in-class differentiation until then (with a bit of enrichment tossed in now and again, but inconsistent with no real tracking of growth), and it's not been enough for my kids. I've had to push for more, because the school tends to use delay tactics -- before you know it, the year is over.

First grade sucked a lot of school enjoyment away for both of my kids and both had a long recovery time (I didn't know better at the time). Neither has the DYS-qualifying PG scores of yours, but are 99th percentile, and one just skipped a grade (the other may later), because there are no compacted class offerings and it was the best option for our situation.