There was the message in ruby-talk at Wed, 9 Mar 2005 10:16:15 
2. Ruby/AGG and Ruby/View (Andrey Melnik)
This will be a wrapper library for AGG (http://antigrain.com) allowing
users to draw high-quality graphics. Later this will be a base for
Ruby-centric GUI toolkit similar to Rebol/view which is also based on
Somebody knows, is there some visible outcome of those efforts?