custom font for darkrp

i have question, i visit the server and looked custom font in doors, how change font for vehicles, doors and hud font like this:

Here is a list of the default fonts, http://wiki.garrysmod.com/page/Default_Fonts. You can make a custom font using this, http://wiki.garrysmod.com/page/surface/CreateFont. Find where the text is drawn in your server files and then edit the fonts they use.

It’s worth noting that AFAIK and from my experience that gmod only supports .ttf format