
They will still load and run, but there will be error symbols doted around the map.
How to install Garry's Mod addons To install addons, you need to extract the addon folder from the zip file to the addons folder in your Garry's Mod folder.
For Example: If you only own Garry's Mod & The Orange Box, then you will not be able to use maps that contain Counter Strike: Source props correctly. To do this your going to need to go to the gmod workshop then find the collections tab and at the side you will see a create collection, your. The map may use textures or props that are not installed on your PC, and the only way to get these props is to have the correct games or prop packs installed. Even when you install your map correctly using the instructions above, it may not work correctly. It normally appears in one of two places: either in the Garry's Mod map list or the Other map list. When you start a new game in Garry's Mod (Multi-player or Single-player), your new map will appear in the map list. Your map is now installed, and ready for use in-game!. " file, click and drag it into the Garry's Mod maps folder. You'll need to create a (free) account first, and quickly verify you own Garry's Mod before you can download anything from the site.
but if you have a lot of trash in your addons folder might be a good idea to re-download them.To be able to use a map, you need to have downloaded it frst! The best place to of this is from. Note: If you decided to keep your subscribed addons you can simply remove the top 2 lines to not have to re-download them. This will remove the folders mentioned in the code above, and then validate the game files (it will req re-downloading a few lua files) witch is quick