Displaying gameobjects over gui

I asked this question prior to this but i never got a clear response on how to go about this issue. Lets say i have a gameobject that has a script that draws a box over the entire screen and the box has 100 percent opacity so there is no way to see through it. How would i go about displaying a gameobject over that box rather than the gui displaying over it? Here is a link to a similar question but following the instructions leads me nowhere. http://answers.unity3d.com/questions/202670/gameobject-on-top-of-gui.html Im desperate for any help as i have spent a week searching for a resolution to this issue.