Hmm. Is being not drawn by text characters enough to be a GUI. Does it satisfy the "UI" in GUI ie being a "user interface" in addition to being graphic? Where are the program icons and pull down menus? Can I actually make the computer do things by issuing commands with the mouse pointer or do I have to fire up a shell and start issuing text commands? Is this a bit like Ubuntu's half-arsed GUI implemetation where reliance on terminal commands is fundamental to its operation..
Yes..
Whether or not it's a "good" or "full featured" User Interface doesn't change the fact that it is a user interface.
It does appear to have movable windows, probably mouse reactive. Although you can have a GUI with only a keyboard.
I don't think (personally) you need to be able to launch an application with a mouse/pointer for something to be a GUI.
It might not be a modern GUI, but it (now that I know it is graphical) looks like a GUI to me.
desiv