For the UC’s you can look at the UC Transfer by major link for GPA admit ranges and admit rates. The data is from 2024 and some majors are not listed for all campuses.
For Cal Poly SLO, here is their 2025 Transfer profile by College: Transfer Student Profile | Cal Poly
SLO Target projections show an estimated 307 Economic Transfer applicants and 18 available spots.
With a 4.0 Transfer GPA, you are a competitive applicant for all the schools. Best of luck.