Growing up around Cardiff, G was destined to become a pro cyclist. Rising up through the British Cycling ranks, Geraint has won six world cups and two world championships. He is a former world champion and Olympic gold medallist in the team pursuit in both 2008 where the squad broke the world records in the heats with a time that beat their opponents comfortably, and in 2012 where three world records were set, finishing nearly 3 seconds ahead of their opponents. Now G focuses exclusively on the road.
Geraint tasted success at the 2004 Paris–Roubaix Juniors, through to senior victories at the 2010 British National Road Race Championships in which his good form continued into the Tour de France, where he finished fifth in the prologue and second on stage three. This led to him leading the young rider classification after stage three. Thomas finished 67th overall in the Tour, and ninth in the young rider classification. Geraint went on to achieve stage race overall victories with the 2011 & 2014 Bayern-Rundfahrt, the 2016 Paris–Nice, and the 2017 Tour of the Alps, as well as winning his first semi-classic, the 2015 E3 Harelbeke. Prior to his victory at Le Tour in 2018 Geraint also triumphed in the Critérium du Dauphiné and more recently has been victorious at the 2021 Tour de Romandie.