Güler has been a regular member of the senior Turkish national basketball team since 2009. He is also the team captain of Turkey's senior national team. With Turkey's senior national team, he has played at the following tournaments: the EuroBasket 2009, the 2010 FIBA World Championship, where he won a silver medal, the EuroBasket 2011, the EuroBasket 2013, the 2014 FIBA Basketball World Cup, the EuroBasket 2015, and the 2016 Manila FIBA World Olympic Qualifying Tournament.