International students who apply for freshman admissions must meet certain academic, course, and English language requirements.
If you completed a US high school program and graduated with a US high school diploma, then the CSU’s domestic “A-G” admissions standards apply.
Academic Performance
“B” or 3.0 Grade Point Average (GPA) on the US 4 pt. scale
Education
Graduate from a “college-preparatory” high school program and have not attempted any college/university classes after graduation.
Courses
Complete university-preparatory mathematics courses including beginning algebra, geometry, and intermediate algebra. All courses must have passing grades (C or better, or the equivalent).
English Language Proficiency
Satisfy the English Language Proficiency Requirement and submit qualifying English exam scores.
Tests
No SAT or ACT test scores are required! Although not required, higher-level test scores may allow you to be placed into higher-level English and/or math courses
https://www.csuchico.edu/admissions/international/requirements.shtml