GNOME Desktop uses the fontconfig font configuration and customization library. The fontconfig library can use all kinds of fonts, including PostScript Type 1 fonts and TrueType fonts.
The fontconfig library provides a list of all the fonts available on a GNOME Desktop system. To compile this list, fontconfig searches the directories listed in the /etc/fonts/fonts.conf file. To view all the fonts available on a system, access the fonts:/// location in the file manager on the system.
For more information about the fontconfig library, see the following URL: