 Liga season, Günter made his debut in professional football, as he stood in the starting eleven of Borussia Dortmund II against Karlsruher SC.Günter was inducted into the Borussia Dortmund's first team in the 2012–13 Bundesliga season, where he was selected for the first time in the BVB squad as an unused substitute on 27 November 2012 in a home match against Fortuna Düsseldorf in the Bundesliga.Günter passed his medical and signed for four and half years with Galatasaray on 30 January 2014 for €2.5 million with Dortmund including a buy-back option worth €7 million.