Can I just "like" GinaW's post? Your ds is clearly well outside of the norm and probably has very different needs than the majority of his grade peers at school unless there is a very unusual population at his school. 134 is right at or very close to the 99th percentile on the WISC. Even if there are 100 kids in his grade, he is likely the most intelligent child in that grade again unless the school population is atypical.
My dd14 is not PG either and she has done very well with a grade skip even though she was the youngest in grade pre-skip. It isn't only PG kids who need something significantly different than the typical curriculum.
