Yes, a 5.0 GPA is entirely possible under specific weighted grading systems used by advanced high schools. In a 5.0 scale setup, an "A" earned in an elite, highly rigorous Advanced Placement (AP), International Baccalaureate (IB), or college-dual-enrollment course is assigned 5 grade points instead of the standard 4. Students who enroll exclusively in top-tier advanced classes and earn straight A's across all of their subjects can achieve a maximum weighted 5.0 GPA, signaling an exceptionally rigorous academic course load.