If the files inside have no extensions, you can use the file command in a command line or an online tool like CheckFileType to see their true format.
Use tools like WinRAR or the open-source 7-Zip . For macOS: Use The Unarchiver or Keka . GIA067-069.rar
While the exact content of this specific archive isn't publicly cataloged in a single database, the "GIA" prefix and the ".rar" extension provide strong clues on how to handle it: Possible Contents If the files inside have no extensions, you