Worth considering: the PSAT & SAT were redesigned, enabling girls to perform better, closing the gap with boys, who had higher scores on average, but grading systems nor pedagogy methods have been changed to accommodate boys even though girls have higher GPAs.
“The average GPA for girls is 3.23, compared to 3.0 for boys, while the average SAT score for girls is 1023, compared to 1032 for boys”