How can I use iTween library to fade in a GUI.Label?

How can I use iTween library to fade in GUI.Label? Is this possible?

You can not use the iTween functionality to fade a GUI.Label. You will need your own code that modifies GUI.color.a to fade a label. Note that OnGUI() gets called multiple times per frame, so you want to be careful how you modify the ‘a’ value. Either do the calculation in Update() or use the Repaint event.