1.2 GLib Naming Conventions

As with many other libraries, GLib has naming rules for consistency and readability:

Function names are always in lowercase, with an underscore between each part of the name : g_timer_new() , g_list_append() . In addition, all function names begin with g_ .
All functions in a library start with a common prefix. In GLib, this prefix is g_ .
Type names contain no underscores, and each component inside starts with a capital letter: GTimer , GList . The names start with G . The notable exceptions to these rules are the elementary types in Section 1.3.
If a function operates primarily on a certain type, the prefix of this function corresponds to the type name. For example, the g_timer_* functions work with the GTimer type, and g_list_* functions go with GList .

It sounds more complicated than it is.