Ruby::GO is an IGS client, written in the Ruby programming language.
Until Febrary/2014 the web page was: http://rubygo.rubyforge.org/
If the project did not migrate to another repository, it does not exist anymore (see https://en.wikipedia.org/wiki/RubyForge).
bugcat: The Wayback Machine has many snapshots of the page from 2004 on. It might well be available there.