I am an international student and I don't know much about gpa on the scale of 4.
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So most colleges use your unweighted GPA which is on a 4.0 scale. They will then take into account the difficulty of your classes and essentially recalculate your weighted GPA. Basically your weighted GPA takes into account the rigor of your classes and unweighted GPA does not. There are plenty of online calculators that can calculate your unweighted GPA based on the grades you received in your classes.
I know you've already received a good answer but here are some articles which can help breakdown the differences in GPA, their importance, and a guide to help you calculate GPA.
GPA Calculator: https://blog.collegevine.com/how-to-calculate-your-gpa-use-this-step-by-step-guide/
Weighted vs. Unweighted GPA: https://blog.collegevine.com/is-weighted-or-unweighted-gpa-more-important
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