Screen position of the uGUI object that deep in hierarchy

I got a Button that deep in heirarchy. The first panel has Horizontal Layout Group, other three is loyout content. I try to get position of the button in one of layout contents relative to screen position.

I already tried

 gameObject.GetComponent<RectTransform>().position
 gameObject.GetComponent<RectTransform>().localPosition
 gameObject.GetComponent<RectTransform>().anchoredPosition
 
 gameObject.GetComponent<Transform>().position
 gameObject.GetComponent<Transform>().localPosition

All just return local position. Can anyone give any advice. Thanks for any help.