Next time show them the below. It’s standard *A benefits and the actual *G benefit doesn’t refer “paid” tickets at all. It’s valid for all types of tickets.:
https://www.flyingreturns.co.in/html/pc_maharajah.php

• Complimentary access to airport lounges on presentation of same-day departing Star Alliance paid ticket and Gold card. One guest is also allowed provided they are also travelling on a paid ticket for same day departure with a Star Alliance Airline.