is a Dynamic Link Library (DLL) file most commonly associated with Guitar Pro (a popular tablature editor for guitar and other instruments) or certain legacy audio software and games. The "gsl" prefix often relates to audio libraries, while "rld" sometimes refers to a cracked or unlicensed version (a "release" by a warez group)—which is a major red flag.
Since antivirus programs often "eat" this file, your first step should be to check your security software's history. Open Windows Security (or your third-party antivirus like Avast or Norton). Virus & threat protection Protection history Look for a recently blocked item related to or your game's installation folder. to put the file back in its original location. 2. Add an Exclusion (Whitelisting) download gsrld.dll