[citation needed] During his junior career he was selected for many representative teams, including Manly, Sydney, Northern Zone, NSW, and Australian Under 16s.

He has recently been chosen as a member of the Wallaby Team of the Decade, a remarkable feat considering his age and one of only three current players picked.

In a memorable double for the Smith family, George's younger brother, Brumbies teammate Tyrone, was named rookie of the year.

[14] His RC Toulonnais teammates included former Highlander and All Black prop Carl Hayman,[15][16] and former Brumbies' scrum-half Matt Henjak.

[17] Smith played for the Australia XV team alongside fellow Tongan, Lisiate Tafa, in the Southern Hemisphere Charity Fundraiser in March 2011 against the Pacific Barbarians.

[18] In the following month Smith become the highest paid Australian rugby player by signing with Japanese club, Suntory Sungoliath, on a $3.3 million three-year deal.

[5] He joined Stade Français in 2012 on a short-term contract for the end of their Top 14 and European Challenge Cup seasons.

[19] In early 2013 the Brumbies announced that Smith would return to Australia on a short term contract for the 2013 Super Rugby season.

[22] Smith was recalled to the Australian squad in June that year for the series against the British & Irish Lions, after recovering from a knee injury.

[citation needed] After leaving French club Lyon on their relegation to the Pro D2, Smith made a move to England to sign for Wasps in the Aviva Premiership from the 2015–16 season.

[31] On 13 July 2018, Smith played his final home game for Queensland Reds, having initially been ruled out with a knee injury.