USC Class of 2021 middle 50 percentiles for GPA UW, 3.77-4.0, ACT admitted 31-34, enrolled 30-34, admit rate 16% (I think class of 2022 was 13%)
UCB Class of 2021 middle 50 percentiles for GPA, W 4.15-4.3, ACT admitted 30-34, admit rate 17% overall
UCLA Class of 2021 middle 50 percentiles for GPA, W 4.13-4.31, UW 3.88-4.0, ACT admitted 30-34, enrolled 27-33, admit rate 16% overall
I’m not sure the various reported GPAs are directly comparable. The UCs might weigh GPA more than test scores compared to USC, but generally, USC seems fairly similar to the UCs for admission. (Stanford is another kettle of fish altogether.)