Nope, no law prohibiting either concealed or open carry on college campuses in PA. You can be asked to leave because you're in violation of school policies, and if you refuse to comply, you can be charged with trespassing. But there is no law on the books that prohibits the act of carrying on a college campus, at least in PA.
So, even if it were a K-12 school, carrying a firearm for self-defense has not yet been proven to not fall under "other lawful purposes".
§ 912. Possession of weapon on school property.
(b) Offense defined.--A person commits a misdemeanor of the
first degree if he possesses a weapon in the buildings of, on
the grounds of, or in any conveyance providing transportation to
or from any elementary or secondary publicly-funded educational
institution, any elementary or secondary private school licensed
by the Department of Education or any elementary or secondary
(c) Defense.--It shall be a defense that the weapon is
possessed and used in conjunction with a lawful supervised
school activity or course or is possessed for other lawful