And World Cup-winning coach Jake White, who has led the Brumbies to the final stage, has paid a glowing tribute to the Wallabies legend.
''I know George is such a humble guy and he doesn't like all the razzamatazz or the talk, but now that I've coached against him and coached him, I can tell you he's one of the greatest ever,'' said White.
''He's got to be right up there. But George, by his own admission, says it's not just about what he does.''
Smith is aiming for a fairytale end to his Brumbies career with a third Super Rugby title.
The formidable flanker made an unlikely comeback to the international stage after the Brumbies signed him on a short-term deal.
Following David Pocock's season ending knee injury, Smith was thrust into the first team and extended his stay.
He then won his 111 Test cap in the Wallabies series decider against the British & Irish Lions, twelve years after he first faced the famous tourists.
White will name his team on Friday, with Smith sure to feature in what will be his final match before returning to Suntory in Japan.
And White hopes his experience of lifting the William Webb Ellis trophy and those of assistant coaches Laurie Fisher and Stephen Larkham will be crucial.
''What I really want to do now is just win this championship,'' added White.
''We don't do anything differently [to what a team does to win the World Cup]. Where I can help these Brumbies players is that I've been there.
''I said to the boys, 'just enjoy this and I can help you through this'. The guys must not have distractions ... Laurie Fisher has won it, Bernie [Stephen Larkham] has won it and George [Smith] has won it.
''The thing that is going to make us win on Saturday is doing the things right and not worrying about everything else.
"It's fantastic to have (the attention) and it's wonderful for the club, but the lessons I've learnt of playing in high-profile games is just do your first job and that's to play rugby."