1 What is it?
Gtk2Hs is a Haskell binding to Gtk+ 2.x. Using it, one can write Gtk+ based applications with GHC.
3 Tutorials and Demos
Some demonstration programs can be found at:
http://code.haskell.org/gtk2hs/gio/demo/ http://code.haskell.org/gtk2hs/pango/demo/ http://code.haskell.org/gtk2hs/cairo/demo/ http://code.haskell.org/gtk2hs/gtk/demo/
See Gtk2Hs/Installation#Supported_Versions for details on which systems should be able to build Gtk2Hs and which are known to be able to build Gtk2Hs.
5 Installation Notes
6.1 OpenGL and Gtk2Hs
These are links to FAQS on the main site.