In my state (ohio) post secondary is the primary option for GT students to move beyond the traditional HS curriculum (my school offers 20+ AP classes, we are a top ranked school in the state). But be careful - many schools post secondary options/agreements are with CCs- that may or may not be accepted by competitive universities. My D had a friend who took all post secondary classes senior year- and turned out none of them were accepted for credit at their university. In contrast- my D took 4 APs, scored 4/5s on all- and all were accepted at their school (NYU)