I think you mean GLib as seen here https://developer.gnome.org/glib/stable/glib-Strings.html
GLib and GTK are closely aligned parts of GNOME so they are easy to get mixed up.
GLib and GTK are closely aligned parts of GNOME so they are easy to get mixed up.
There were a few big libraries in the ecosystem if I remember well, GTK, glib and another two. They're from the same origin and often mixed together.
It's been almost a decade since I dabbled into this stuff day-to-day. I think being forced to use glib is the turning point in a developer's life where you realize you simply have to move on to a more usable language.