Since the filename Gremlins.1984.1080p.720p.BluRay.x264 suggests a standard scene release, these popular repositories will likely have high-quality matches:
: A massive database where you can search by the exact filename of your video. subtitle Gremlins.1984.1080p.720p.BluRay.x264.[...
: English (SDH), Spanish, French, German. Runtime : ~1h 46m Since the filename Gremlins
If you are looking for subtitle files for the 1984 film Gremlins to match your specific BluRay rip, Recommended Subtitle Sources subtitle Gremlins.1984.1080p.720p.BluRay.x264.[...
: Keep both the video and the subtitle file in the same directory.