What must your SAT or ACT scores be to be accepted into a UC school? And what would your GPA have to minimum be? Thanks ! 
There is no minimum score for UC’s. You want the highest possible score you can achieve and many times this is not enough. Look at the UC averages for of the campuses and see what you need to aim for: http://admission.universityofcalifornia.edu/freshman/profiles/
Minimum GPA is 3.0 weighted for in-state, 3.4 OOS but these will only get you into the UCM/UCR maybe UCSC on average.
If in-state, consider the Cal States since many are just as competitive as the UC’s.
Do a google search fpr UC X Common Data Set. That’s a document all accredited schools publish annually. They report the % of applicants accepted with grades test score intervals.
At most UCs, you’ll find just a handful of applicants below 3.75 are admitted.