What are my chances for transferring to the different UCs?

I plan to do Cognitive Science at either UCB, UCLA, or UCSD, Technology & Information management at UCSC, or Informatics at UCI. I have a 3.71 GPA. IGETC completed. Major prep courses not fully completed yet. ECs include 2 unpair internships, advocacy work, committee member, and years of volunteer experience. Had some medical/financial hardships through the past couple years, so there is a small gap during my time at the Community college.

Go here (see below) and find the admit rates and mid-range admitted GPAs by major at each UC. You want to be in that GPA sweetspot, the higher the better. Assuming you have IGETC and major prep completed via assist.org, you’ll be a competitive applicant.

They won’t care about the gap.

https://www.universityofcalifornia.edu/infocenter/transfers-major