GUIElement.GetScreenRect
GetScreenRect(camera: Camera = null): Rect;
Description

Returns bounding rectangle of GUIElement in screen coordinates.

If no camera is given a camera filling the entire game window will be assumed.
	function Start () {
		var r : Rect = guiTexture.GetScreenRect ();
		Debug.Log ("This gui element is " + r.width + " pixel wide.");
	}