This is most likely a vehicle or track mod. "GP11" is a common designation for Formula or MotoGP style vehicles from the 2011 season.
If you downloaded this from a modding forum or a school portal, verify the checksum if provided. [KS] KS4 GP11.rar
.rar (Roshal Archive), which requires software like WinRAR, 7-Zip, or The Unarchiver to extract. Naming Convention: This is most likely a vehicle or track mod
with an updated antivirus (like Windows Defender or Malwarebytes) before extraction. which requires software like WinRAR