How do I create two vertical columns?

I want to have two vertical columns. My left column would contain GUILayout elements, and the right column would contain the actual game. I know I can overlay GUILayout elements over the game, but if don’t want to do that. Does what I want to do require two split screen cameras? If so, do i position the left camera far enough away from where the game is rendering?

http://forum.unity3d.com/threads/110651-orthographic-camera-for-GUI-perspective-camera