Gtk command line console widget

["MAIDA, JAMES C. (JIM) (JSC-SF) (NASA)" <james c maida nasa gov>]

I am looking for a command line console for gtk. Something that will work on
both Linux and Windows.
At the very least, I would like to have a text input window (not just a
single line).
I am very pleased with gtk so far. It is conceptually and
implementation-wise much cleaner than MFC etc. 
Jim Maida