Your GPA is good enough for you to get into college but will not taking 9th grade gym prevent from getting college?

No, not taking 9th-grade gym will almost certainly not prevent you from getting into college. Colleges look at your overall academic record, including your GPA, standardized test scores (if required), extracurricular activities, essays, and letters of recommendation. A single missing gym class in 9th grade is insignificant in the grand scheme of your entire high school career.