Thanks to LordOfWaffle for finding this file location.

For those who want to make this your personal server map, follow these steps to find where the source is and to have it as an option for your Server Maps.

C:Storage/Program Files(x86)/Steam/steamapps/workshop/content/304930/620777609

From there just copy the "Georgia - TWD" file and paste it into your Server's Maps folder, so when you type in the cmd box which map you want, just type the folder's name, which should be Georgia - TWD.

Hope this helps!