The midfielder admits he has long been a target for Partenopei boss Rafa Benitez but is now set to stay with Lyon after failing to agree terms with the Serie A giants
The Serie A runners-up have long been linked with a move for the 25-year-old and saw a January bid of €17 million turned down.
Napoli president Aurelio de Laurentiis admitted in April that he could yet consider sanctioning another bid for the midfielder, but Gonalons has since claimed that talks have reached an impasse as he has been unable to agree terms.
Gonalons now says he is set to stay with Lyon and will "probably lengthen the contract" at Stade Gerland.
"I would have liked [working with] Benitez, and the deal has been going on for a year, but I've not been satisfied with all the details," he is quoted as saying by Tuttosport.
"In Lyon, I'm happy, even if the interest of Napoli flattered me, as we are talking about a great club."
Gonalons, who came through the youth ranks at Lyon, has made more than 150 appearances for the senior side since 2009 and has six senior caps for France.