Should I also submit my high school GPA and should I convert my GPA to a 4.0 scale?

You will be expected to provide the cumulative GPA 9 through 11 as recorded on your transcript, but will not need to recalculate to a 4.0 scale. Enter the GPA as it appears on your transcript. If your school provides both a weighted and un-weighted GPA on the transcript, you should provide the weighted GPA.