I have a 4.0 weighted UC gpa, i have few ec’s but I have done a volunteer work club for 2 years and math team for one. I have also taken choir for 4 years. My current scores are 1620 and 26 but I am retaking both. And actually studying… Lol. I am in the process of applying to UCLA, UCB, and UCSB. If it makes any difference, I’m in the top 10% of my class of 900+ students and I’m from California. My senior year schedule compromises of: AP Lit, AP Calc BC, AP Bio, APES, Chamber choir, and Gov/Econ. I’m also applying as an undeclared social science major 
PLEASE HELP 
If you get your ACT score to a 30 or your SAT to a 2000 I’d say you have a pretty good shot at San Diego. For LA and Berkeley I think you need a higher GPA though