I have to agree with the others. A GED or a normal high school diploma is only equivalent to GCSEs and not A-levels, so most universities require at least 3 APs or 2 APs and a certain SAT score (A*AA equals about 720, ABB about 660). So if you haven't taken either APs or SAT you won't get straight into a course. Also, I'm just gonna make a bit of promotion for my uni, but Warwick offers an international foundation programme with 12 different courses, depending on what you are planning to study, and the entry requirement is a High School Diploma with an overall GPA of 3.0/4 in the final year. But yeah, just google around, most unis offer IFPs, I'm sure you'll find something.