求问overall standing是什么意思？

求问UCSD的GPA的要求说明里面的overall standing是什么意思？是要求一定要有排名还是什么？

下面是网上拉下来的原话
When applying, you do not have to convert your grades to a 4.0 scale. Instead, please indicate your overall standing and the grading scale used in the fields provided in the online application.


那这样的话我们要换算成绩么？