SubDL has 243 subtitles for Grid (Geurideu / 그리드) across 21 languages. New subtitles are added as the community uploads them.
Grid (Geurideu / 그리드) subtitles are available in English, Persian, Japanese, Spanish, Indonesian and more — 21 languages in total.
Open the language you want, pick the release that matches your video file, and click the download button. The file is a free .srt and no account is required.