I have already submitted my SIR to UC Davis and applied to the college through TAG, which requires a maintained 3.2 GPA at the end of Spring. But I have already graduated from my community college with a 3.148 GPA. Will this affect my TAG application, causing it to be revoked, and therefore making me unable to attend UC Davis?
It may, but only Davis (or perhaps your CC Transfer Counselor) can answer that question.
Contact them on Monday to inquire directly.