can we add any special effect in GUI.Box like moving gui.box front and back.like wise any special effect is there for gui.box
http://www.youtube.com/watch?v=2peBo1qiX8M
That can be done...
And you can move the GUI objects around... And they do have Z axis... So:
http://unity3d.com/support/documentation/Components/class-GUILayer.html
Look up some stuff on that... So yea, it can, but I don't think that this is how you mean... Best just to do what the video did by making actual 3D objects do the moving... Easier and safer.
Hope this helped!