Where to install an addon on Gmod?
Unzip file compass-zworld-afterlife.zip
Copy the files extracted to the folder Garry's Mod : \Steam\steamapps\common\GarrysMod\garrysmod\addonsIII)
After installation restart your server (Garry's Mod)
💡 Avoid the use of commands to reload scripts after installation. A restart is preferable, this has already solved the installation problems and it is clean.
⚠️ Never install your addons in the Lua folder at the risk of making bad handling and break your Gmod, that can cause a malfunction of your server and installed addons :\Steam\steamapps\common\GarrysMod\garrysmod\lua