Now with Monaco, the defensive midfielder first got to grips with the game at Stella Club d'Adjame, a club based in one of the poorer neighbourhoods of the capital, Abidjan. Quick and blessed with good technique, he was soon spotted by Argentinian coach Luis Oscar Fulone and recruited by Wydad Casablanca, turning out for the Moroccan outfit from December 2002 to December 2006 and helping them secure the league title in his final season.
Praised as the finest overseas talent in the Moroccan top flight, Gosso next set sail for Israeli side Ashdod in January 2007. He made 44 appearances and struck two goals for his new employers only to fail to meet their high expectations, yet his talent did not go unrecognised by Monaco and their then coach Ricardo. The former Paris Saint-Germain defender promptly snapped Gosso up in the summer of 2008, stating: “He’s an interesting player and very strong in midfield. The other players instinctively give him the ball, which is a good sign. He’s a promising player.” The newcomer went on to make 31 appearances for the principality outfit in 2008/09, 29 of those as a starter.
His international debut followed in November 2008 as Côte d'Ivoire took on Israel, and former Elephants tactician Vahid Halilhodzic selected him for the 2010 CAF Africa Cup of Nations in Angola. He played in two qualifiers on the road to South Africa, contesting 110 minutes overall.
Between 2003 and 2005, Gosso represented his country at Under-20 and U-21 level, captaining the side that finished runners-up at the 2003 CAF African Youth Championship before reaching the Round of 16 at the FIFA U-20 World Cup the same year.