The UC’s have Freshman profiles posted in the UC website but the information is by campus and not major specific.
Here is a summary of the UC data and again not major specific, but the more competitive majors will have higher GPA’s and test scores. UC’s also consider HS course rigor, personal insight essays and EC’s in their application review so GPA/Test scores are very important but not the only consideration.
2018 UC capped weighted GPA averages:
UCB: 4.23
UCLA: 4.23
UCSD: 4.16
UCSB: 4.13
UCI: 4.13
UCD: 4.11
UCSC: 3.96
UCR: 3.81
UCM: 3.71
2018 Data:
25th - 75th percentiles for SAT:
UCB: 1360-1540
UCLA: 1340-1540
UCSD: 1300-1520
UCSB: 1270-1500
UCD: 1220-1480
UCI: 1230-1490
UCSC: 1210-1450
UCR: 1130-1380
UCM: 1020-1280
25th - 75th percentiles for ACT:
UCB: 30-35
UCLA: 31-35
UCSD: 28-34
UCSB: 28-34
UCD: 26-33
UCI: 26-33
UCSC: 26-32
UCR: 22-30
UCM: 19-26
I also have admit rates (general not major specific) based on your Capped weighted UC GPA so if you post your GPA and I list the admit rates for each campus.