Use UC Admission Index calculation http://admission.universityofcalifornia.edu/freshman/california-residents/admissions-index/instructions.html
4 UC score = 0.05 GPA = 1 ACT point = 40 SAT points
So translate 0.1 GPA = 2 ACT point = 80 SAT points
GPA generally weights more than test scores by above amount:))