Create GUI UI at GameObject position

Question

I want to create a GUI UI at the position of a GameObject, specifically this example menu:

http://docs.unity3d.com/Manual/gui-Basics.html

I've tried this:

new Rect (playerPosX, playerPosY, 100, 90)

as the first argument using gameObject.transform.position.x and y but the GUI is top-left based.

How do I do this?

Answer 1

WorldToScreenPoint will do the trick.
Unity Documentation

var pos = Camera.main.WorldToScreenPoint(GameObject.Find("NameOfObject").transform.position);
    Rect d = new Rect(Screen.width - pos.x, Screen.height - pos.y, 400, 400);