: If this is a standard zip file, use 7-Zip or WinRAR to manually extract the contents into your steamapps/common/GarrysMod/garrysmod/addons folder. Are you seeing this text in a specific error log or
The string you provided appears to be a corrupted or misencoded Russian phrase: (Extracted file — Garry's Mod.ZIP). This specific text is often found in technical logs or crash reports associated with Garry's Mod (GMod) when a user or the game itself is attempting to extract contents from a compressed archive.
: Garry’s Mod add-ons are often stored as .gma files. You can use tools like GWTool or the official gmad.exe found in your game's /bin/ folder to unpack them.