How can I access to main loop in GTK+ apps?

["Tomasz Jankowski" <tomcioj gmail com>]

Hello!

I'm searching through API references for GLib and GTK+, for functions which
let me to attach new GSource to programs's main loop. I have no idea how to
get a pointer to main loop run with gtk_main_init. Can someone help me with
it?

-- 
Cya!
Tom