Froshmore GPA vs upperclassmen GPA?

Pre-College Topics High School Life
1

(I would be especially helpful if someone from Georgia could answer this question).

I know that freshman and sophomore year your GPA starts off at a 4.0 (in every class you start with a 100), but is it true that your starting GPA senior year is what you ended junior year with?

Or a simpler question: Is senior year GPA cumulative?

2

For us senior year GPA is not cumulative, but your overall high school GPA is.