You can use a gamepad as a remote to control xlobby using Xpadder software
"Xpadder simulates keypresses and mouse movements using a gamepad" . so it’s very easy to control xlobby via a gamepad with this software. and maybe do more than only navigate in xlobby
you can : control the mouse cursor using the pad, simulate keyboard arrows and every others keys or combination, do right and left mouse click etc…..
if you want use a gamepag as a remote you should certainly use a software like this one