According to Goal.com, Barcelona scout Luis Gonzalez watched him in action in Fenerbahce's win over Istanbul Buyeksehir and would be heading to Turkey again to take a second look.
Nicknamed the "Turkish Cafu," Gonul flourished under then coach Zico with solid performances during the 2008-09 UEFA Champions League season.
Gonul has made over 100 official appearances for Fenerbahce and the 26-year-old right-back is considered to be one of the best players in the Turkish league.
Barcelona have been laced with injuries in defense during the current campaign and have been forced to play Sergio Busquets and Javier Mascherano at center-back position, and Carles Puyol as a left-back at times.
Gonul has played as a midfielder and striker during his career, and has also featured as a goalkeeper in his early days. His signing would bring more flexibility at the back and can be used to reinforce injuries.
In other news, Barcelona are also being linked with Atletico Madrid's Diego Forlan. Barcelona are looking to strengthen their firing line and the names of Giuseppi Rossi and Neymar have also been linked.
However Andoni Zubizarreta and Josep Maria Bartomeu understand the financial restraints of the Catalan club and would like to bring in a player who has excelled in the La Liga and has been a proven goal scorer.
Diego Forlan, with his scoring prowess, fits the bill.