If you are applying to transfer as a sophomore and since you would not quite have a year of college grades completed, USC admissions will want to look at your high school grades, records and SAT/ACT scores. To have some chance in getting accepted, you should achieve a near 4.0 GPA in your freshman year, especially since you did not perform well in high school. Even a 4.0 is no guarantee. Your chances would increase if you apply as a junior and maintain at least around a 3.7 GPA.