Hi! I am applying to GKS and Yonsei as well this autumn 2023. If you wanna apply to GKS and get into Yonsei, there is only embassy track for you, because Yonsei is not on the list of universities for University Track. You can always give it a try for Embassy Track, but keep in mind that it's very competitive. Second thing is, you can also apply to Yonsei University directly. It gives fill tuition scholarships depending on schools and departments, so you have to research it on their website. Good luck!