Use the CSU GPA calculator that I have linked and add in the 9th-11th grades for the a-g courses taken. Add 1 Honors point for each semester of a CSU approved Honors course/AP/IB or DE/CC a-g courses that was taken 10th-11th grades. Maximum Honors points is 8 semesters.
Example: 25 A’s and 5 B’s with 2 AP classes in 10th and 2 AP classes in 11th (total 8 semesters) = 4.1