Other race wins for Thomas include Paris-Nice in 2016, Critérium du Dauphiné in 2018, the Tour de Romandie in 2021 and the Tour de Swisse in 2022.
On the track, Thomas is a two-time Olympic gold medalist, having formed part of Team GB's winning men's team pursuit at both the 2008 and 2012 games.
He said his 2018 Tour de France win would "go down in history" and that he would be "cheering him on over the coming months as he competes in his final season".
Mr Park said Thomas was "a fantastic role model to the next generation of pro cyclists" and that he had been "a key figurehead in every team he's been a part of over the years".
Former Tour de France winner Geraint Thomas has announced his retirement.
