ScreenToGUIPoint

Could somebody explain to me how I can convert a screenPoint to a GUIPoint. I've tried the GUIUtility.ScreenToGUIPoint but it doesn't seem to return what I want. Heres the testing code. The guiPoint remains the same as the screenPoint for some reason.

 Vector3 viewportPoint = new Vector3(1,1,1);
     Vector3 screenPoint = new Vector3(1,1,1);
     Vector2 guiPoint = new Vector2(0, 0);
 
     void OnGUI()
     {
         guiPoint = GUIUtility.ScreenToGUIPoint(new Vector2(screenPoint.x, screenPoint.y));
         
         GUILayout.BeginArea(new Rect(0, 0, 200, 200));
         GUILayout.Label("Viewport X: " + viewportPoint.x);
         GUILayout.Label("Viewport Y: " + viewportPoint.y);
         GUILayout.Label("Screen X: " + screenPoint.x);
         GUILayout.Label("Screen Y: " + screenPoint.y);
         GUILayout.Label("Gui X: " + guiPoint.x);
         GUILayout.Label("Gui Y: " + guiPoint.y);
         GUILayout.EndArea();
     }
 
     void OnMouseOver()
     {
         viewportPoint = transform.parent.camera.ScreenToViewportPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y,0));
         screenPoint = transform.parent.camera.ViewportToScreenPoint(viewportPoint);  
     }
 }