destroyed_houses.zip

This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below:

• steamapps
  • common
    • garrysmod
      • garrysmod
        • addons
          • Destroyed_Houses <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• Destroyed_Houses/
  • house_big.txt
  • house_giantly.txt
  • house_huge.txt
  • house_large.txt
  • house_small.txt
  • house_tiny.txt
  • README!.txt
  • Screens/
    • house_big.jpg
    • house_collection.jpg
    • house_giant.jpg
    • house_huge.jpg
    • house_large.jpg
    • house_small.jpg
    • house_tiny.jpg

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