switchitter,
In California, the UC system uses a 4 point scale for regular classes and and adds 1 for AP and some honors classes. So if a student took all AP courses, and received an A+ for all of them, he would have 5.0 GPA weighted.
Both are reported (actually one of my sons seems to have 5(!) GPAs listed on his report card). Some colleges look at the unweighted GPA and others use the weighted. As said above, the NCAA uses unweighted; generally only core courses are considered-- your child's PE grade isn't very important.