I’m not sure about that. 3GL’s transmitter was originally in Grovedale, a southern suburb of Geelong. The signal was okay into Melbourne but nothing special once you got away from the bay.
The current site may have been used by 3GL towards the end before the jump to FM. But it wouldn’t have been for long. It’s a good site for getting across to Melbourne. Would have been even better if it was further towards Portarlington.