Wyn,I certainly don't have any "inside track". If I did,I'd be able to meet far more celebrities.
Meeting Gordon isn't all that difficult,after the concert,just wait outside with the other autograph seekers and well wishers and you'll meet him and the group.
I tried getting backstage myself,even talked to Terry Clements before the show at the north stage door entrance. No luck... and security,not surprisingly,wasn't too fond of my sitting on a bench outside that door.
It's one thng for an after the show meet & greet but anything longer than that,is something that needs to be pre-arranged far in advance.
I've met him twice and,personally,I'm satisfied with that.