The sequence "GDBXIJJG" could be a simple substitution cipher (like ROT13 or a Vigenère key) or a specific hash used to identify a file on peer-to-peer networks or "deep web" archives.
The string does not appear to correspond to a known public file, software project, or widely documented "deep piece" of media. GDBXIJJG rar
It may refer to a specific commit or private directory name in a developer's environment that hasn't been indexed by major search engines. The sequence "GDBXIJJG" could be a simple substitution
The "rar" extension indicates a compressed WinRAR file. If you found this string on a forum or imageboard, it is likely a unique filename or a password for a specific download. GDBXIJJG rar