You can definitely add me to the list. Would love to do fhis

 

Does this. work only when car is parked?

 

No, works always.

 

Should I need a converter such as the naviks unit to my 2011 G37 IPL to display android auto on stock screen??
Has anything changed over that time?

 

That's the easiest way yeah.
Motorvate has figured out AV in on the stock system, but it requires console access, commands and some wiring... so if you don't want to go through that the naviks is your best bet at the moment.