Hi,

Well consider that you want to apply for KGSP scholarship and asking about SAT, I am assuming you to be looking for undergraduate studies. For undergraduate students, colleges in Korea usually don't make it mandatory to submit SAT or other exams like IELTS but it's always a plus point if you submit test scores. You are given preferably over students who don't submit scores. But eligibility wise, it is not mandatory to get admission or to apply under the KGSP scholarship.

I hope this helps.

All the best.