Are game modes in Garry's Mod free?

Do you have to pay for the gamemodes in Garry's Mod or are they free? I've looked up and not found anything and watched videos to try and find out but I did find a Steam page that some people say its free some say that you have to pay so are they free?
Best Answer
All of the game modes in Garry's Mod are free. However, some servers or custom game modes may use assets from other Source games, such as Counter-Strike: Source, Team Fortress 2, or Half Life 2: Episode 2.
If you do not own these games or do not have them installed, any missing textures from those games will replaced by a pink checkerboard while missing models will display as a red ERROR.
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How do I use game modes in GMod?
To set the gamemode on a Garry's Mod server, click on the "Game Settings" tab on the left side of the Nodecraft server control panel, then edit the gamemode option as presented. This will generally relate to a folder in the garrysmod/gamemodes directory on your server, but may differ if using a workshop gamemode.Are GMod servers free?
No there isnt any gmod free server hosting. You need to pay for a server online or you can host it yourself if you want.How do you download Gamemodes in GMod?
If the gamemode is to be installed into the gamemodes directory, drag the folder from your file manager and drop it into your server's gamemodes folder. If the gamemode is to be installed into your server's addons folder, drag the folder from your file manager and drop it into your server's addons folder.The Ultimate GMOD Tier List
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Answer 2
Garry's Mod gamemodes are completely free, with an exception being those from random websites that try and sell you a hack with the gamemode.
They can be downloaded directly into your game from the Steam Workshop.
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