Ghouri attended his German team's Christmas party on December 11 and was due to travel to see his family in Paris.
When he failed to turn up his family filed a missing persons report and a police appeal for his whereabouts was issued.
German media confirmed today his body had been found in the River Rhine, with no indication of violence.
During his career he played for teams in Israel, Switzerland and Germany before joining Wigan in 2010.
He was released at the end of the 2011/12 season and went on to join a Greek side in 2013.
Tributes have been paid to the player online and on social media, including one from his former UK side.