Test scores above the 50th percentile can enhance your UC application. I also think you need more target schools.
Cal poly SLO uses 9th-11th grades in their GPA unlike the UC’s and the rest of the Cal states.
You can use the Rogerhub calculator and add 9th grades to the calculation to get your SLO GPA capped weighted.
College of Architecture & Environmental Design
GPA admit range middle 50th percentile: 3.86 – 4.25