Alex, PSU is a public school, Also a land grant school. In the unlikely event you got your GED at State College Area High School at age 15 PSU would HAVE to accept you as a student (they could kick you out the next day).

Also, PSU welcomes High School students to take classes. They are great because they count for High School and University credits.

The youngest kid I knew taking a PSU class was in 8th grade making her about 14.

But the campus is huge and not exactly closed. Any PA resident who likes can get a card for their libraries or memberships at their gyms or natatorium.

Teenagers and younger were not uncommon on the PSU campus.