Cal poly SLO will recalculate your CSU GPA using the 9th grades. On the application, you enter in your CSU GPA using 10-11th grades. You will also enter in your 9th grades which SLO will use to calculate their GPA. I was just wanted to know if your 9th grades will change your CSU GPA significantly. Also how can you enter in 12th grades when you do not have them? I have gone through CSU admissions to SLO and many other CSU’s these past few years with my son’s and niece and believe me, SLO uses 9th grades in their GPA calculation.