Note that some other a-g requirements can be fulfilled or partially fulfilled by SAT subject or AP test scores:
http://admission.universityofcalifornia.edu/counselors/freshman/minimum-requirements/subject-requirement/index.html
If there are any where you cannot complete the high school course work for (or get high school records from your previous high school in Iraq for) and cannot take college courses for, you may want to see if SAT subject or AP tests in those areas can help you fulfill them.