ADDON/resource/fonts/FONT.ttf SERVER/garrysmod/resource/fonts/FONT.ttf
это два способа установки
узнать название шрифта можно через просмотр шрифта, в поле "Font Name"
Adds the specified and all related files to the files the client should download. For convenience, this function will automatically add any other files that are related to the selected one, and throw an error if it can't find them. For example, a . vmt file will automatically add the . vtf with...