How hard is it to get into Cal Poly? Just ask the more than 54,000 first time freshmen who applied to attend the school. School officials say they accepted just over 15,000 applicants. Close to 5,000 were preliminarily accepted. Officials were forced to turn away more than 13,000 potential students with a GPA of 4.0 or higher. The average GPA of accepted students was 4.09.