GPA vs. ACT score

My son has a 2.6 GPA but scored a 31 on his ACT (first time). How do most colleges deal with a discrepancy like that? He is involved in all the possible music/theatre/speech/debate activities possible and excells in these areas. He was a Nationals Debater as well as a 3X Iowa All State Speech. Should we apply to the selective schools (we were looking at a possible St. Olaf, Carleton, Gustavus Adolphus) or is that setting our sites too high?