GWU is test-optional for many applicants, meaning you can choose whether or not to submit your SAT/ACT scores. However, if you *do* submit scores, they will be considered. A strong GPA is still crucial regardless of whether you submit test scores.
To get a better idea of the *average* scores and GPAs of admitted students, check GWU's Common Data Set. This report usually provides information on the middle 50% range of admitted students' academic profiles. Look for the section on first-year applicants. Remember, this is just an average; admission is not based solely on these numbers.
In short: There are no *required* SAT/GPA minimums. A highly competitive application will typically include strong scores and GPA, but GWU emphasizes a holistic review process considering many factors beyond these two metrics.