Here are some links so that you can download the game content -
Maps-
Addons- Durgz Mod
SVN Links-
go to the Tortoise SVN just click the link and click on the downloads tab on their page next your going to need to figure out which kind of operating system you have (you can do this by clicking the start menu then right-click computer and select properties it should tell you if you have a 64 bit operating system or 32 bit operating system which ever one your computer says you have thats the one your going to need) next go back to the Tortoise SVN Downloads page and download the one your computer needs i will put links under this for the 32 bit operating system download and a link for the 64 bit operating system. once your done downloading Tortoise SVN you are going to need to install it.
How to use Tortoise SVN-
All of the SVN links above are addons so just go to my computer> C Drive> Program Files> Steam> Steamapps> "Yoursteamname"> Garrysmod> Garrysmod> addons
Cant locate it? try just searching steam because it might not be in the same spot as mine on your computer. next what you need to do once your in your addons folder, make a new folder for whatever SVN addon you want and name it as the addon name so if you wanted Wire mod just name the folder "Wire mod" and right click on the same folder with no files in it then select "SVN Checkout" it will bring up a screen like this
in this screen this is where you are going to come back to sloth gaming's website and go to the downloads page depending on what you wanted you are going to need to go under the SVN links at the top of the page and right click on anyone and select "copy link address" or "Copy url " and paste it in the SVN checkout screen (the part where i sircled is where you paste the link) after its pasted just click ok and checkout another screen will show up and show you what files are being downloaded it will also tell you when the download is complete.
