You can calculate it yourself by taking the sum of semester grades in academic courses with A=4, B=3, C=2, D=1, F=0 and then dividing by the number of grades. If all of your grades are A grades, then your unweighted GPA is 4.0.
A 4.735 weighted GPA is meaningless outside of your high school, unless it matches the recalculation done by colleges you are targeting.