GED, skip some high school grades

I am just confused as what to do with my DD. She is going to Grade 8 in the Fall. She is already in accelerated math program and will finish AP Calculus BC by Grade 10. She also does well in her English in SAT. She is not challenged in her current grade. Is there a way to skip a grade or 2 in high school. We are thinking of perhaps just write the GED and do homeschooling to get to University at an earlier age. We want DD to go to California University likes Davis or UCLA or Berkeley. I am wondering if California has the similar program as in Texas TAMS program where high school kid studies in University. TAMS is only open to Texas resident.