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.[...
: Even if your rip isn't from YIFY, their SRT files are usually timed for 23.976 fps BluRay releases and work well with most x264 encodes. How to Sync the Subtitle Since the filename Gremlins