TAG is Transfer Admission Guarantee for 6 of the 9 UC campuses (some campuses have excluded majors for TAG). You need to meet the TAG GPA and required courses for transfer and you are then guaranteed admission. I still think UCI would be possible if you try to transfer with TAG or no TAG , if you get a competitive GPA at your CC.
http://admission.universityofcalifornia.edu/transfer/guarantee/index.html