I'm slightly confused when you say a 98.6 GPA. Where I am from a GPA can either be weighted which is usually on a 5.0 or sometimes even a 6.0 scale or unweighted which is on a 4.0 scale. Do you mean that an average of all his class grades was a 98.6? Also, I do not want to needlessly argue because you obviously have your mind made up that your son is the best of the best