How do you install addons onto a rented server. This may seem like a very noobish question, but when I try to upload a file it will only let me upload the files one by one lua file, which would take forever. So how do do it?
Use an FTP client like FileZilla.
How does it work?
Zip the files, upload, and unzip.
Also, this is something you should be asking your game server provider, not facepunch first. Usually they can answer if anything is specifically different to your host.
If you have FTP access, get FileZilla.
Then navigate to the server addons folder (orangebox/garrysmod/addons), right click an addon you want to upload from your GMod addons folder, and click Add To Queue.
Then when you’ve got everything added to queue, right click the queue (down bottom) and click “Process Queue”. This will upload everything, up to 10 files at a time (though I think the default is 5)