This part of the tutorial is actually copied off https://developer.valvesoftware.com/wiki/SteamCMD
First, you need a program called SteamCMD. The Steam Console Client or SteamCMD is a command-line version of the Steam client. Its primary use is to install and update various dedicated servers available on Steam using a command-line interface. It works with games that use the SteamPipe content system. All games have been migrated from the deprecated HLDSUpdateTool to SteamCMD. Download SteamCMD at https://steamcdn-a.akamaihd.net/client/installer/steamcmd.zip or, just go here https://developer.valvesoftware.com/wiki/SteamCMD#Downloading_SteamCMD

Next, you create a folder called:

Unzip the contents of the downloaded folder into this file:


Now press Win + R and type cmd, a command prompt panel will open, type this:
then type:
Things will start to download, once they finish type:
then type:
Now you have to download the garrysmod server files:
then:
now type:
Congratulations, you have downloaded the server content, now for some difficult stuff.
Goto C:\my_garrysmod_server and create a new notepad called start
Paste this code into the notepad:

THIS IS VERY IMPORTANT, CLICK SAVE AS, AND CALL IT start.bat

All internet hubs are different, this is on my virgin media super hub
Press Win + R and type cmd. In cmd type
You need 2 things, your IPv4 Address, and your default gateway, make a note of them
I have hidden the final didgit but it will be there

Type your default gateway into your web browser and login (most hubs will still have their default logins, you can find a list HERE[www.urtech.ca].
If your hub is not on this list, Your login might be on the back of the router

As I said, all hubs are different, but try and find the 'port forwarding' tab

Now, name this port garrysmod and set all ports to 27015, set the protocoal to TCP&UDP and set the IP Address to your IPv4 address, make sure it is enabled and click apply/save





Start up your server with run.bat and people can start joining your, addon-less, vanilla server. Time for some MINT, or CHOCOLATE... whatever floats your boat... I mean sundae.

To connect to your server, go onto Garrys Mod, click on multiplayer, and click on local network, If your friend wants to join, either invite them or they will have to find it by searching through the lists of servers in the server browser

This bit is quite hard, but once done is so much easier than actually manually installing all the addons.

First, create a collection of all the addons you want on your server.
Do this by subscribing to the things you want in your collection, then click HERE and create a collection with all those things you want in them.

Once published, look at the URL at the top e.g: http://steamproxy.com/sharedfiles/filedetails/?id=67067**** copy the bit in bold ( I have taken away the final 4 letters.) If you did this on the steam client, then go online to: http://steamproxy.com/id/YOURNAME/myworkshopfiles/?section=collections and click on your collection. Keep this number safe as you will need it later.

Now, go to http://steamproxy.com/dev/apikey and login, set steamidfinder.com as the API domain name. You should get a key. Keeps that safe like the other number as It will be needed later:

Now, earlier, we created a start.bat file, right click and open it with notepad, on line 8, add this

+host_workshop_collection 67067**** -authkey 441FE478FC8768****************** (Obviously with your own code


It should look something like this.





Now everything in that collection will be put on your server. Just restart the server. and It will install

You now have a working server, join my steam group and friend me on steam if you have any questions?

Once you have done all that, you will want a server name, rcon password etc. It is the most simple part of this guide.

Click HERE[csite.io] set your settings as you want.
Make sure sv_password is empty (unless you want a private server)

Once it generates the code, just copy ans paste it into:

C:\my-garrysmod-server\garrysmod\cfg\server.txt

Restart your server

Updating is very simple. Open up SteamCMD and type:


then:


then:


then type:


You will need to update your server everytime gmod updates, otherwise, people will not be able to join.

Last part is so long it wont fit in the guide, so here is a pastebin of it
https://pastebin.com/uDEMrsTW

• Reached 11000 unique visitors
  
• Archived guide. (Too many people adding me, it was so long ago that I have mostly forgotten how to do it anymore, sorry.)

• Reached 10000 unique visitors

• Reached 9000 unique visitors
  
• Removed server auto installer (I can't host it anymore, im too poor.)

• Finished server auto-installer.

• Reached 8000 unique visitors.

• Continuing server support.
  
• Adding an auto server creator.

• Created Video tutorial Version 1.0.
  
• Reached 7000 unique visitors.

• Fixed SteamCMD link
  
• Started creating pre-made server files.
  
• Added Configure Server(optional) section.
  
• Added Update Server section.
  
• Added Warning note on pre-made server section.
  
• reached 6000 Unique visitors.
  
• Created OSX Version 1.0 Guide

• reached 5000 unique visitors.
  
• spell checked

• Guide created