There are plenty of California universities that a 3.6 GPA would be competitive.
Are you at a California Community College currently? If so, the CC’s transfer advisor is there to help you figure out what you need to successfully transfer to a UC or Cal State.
The UC’s offer TAG (Transfer Admission Guarantee) for 6 campuses where if you meet GPA and course requirements, will be guaranteed admission at one of the TAG campuses. https://admission.universityofcalifornia.edu/counselors/_files/documents/tag-matrix.pdf
UC Transfer GPA by major and campus can help determine if you competitive: Transfers by major | University of California
The CSU’s offer ADT which guarantees transfers and acceptance at one of the 23 CSU’s however, specific campuses is not guaranteed.
The universities would look more at your recent grades so showing an upward grade trend will definitely help.