Gjergja signed with Telenet BC Oostende in December 2011.

He was named the Coach of the Year in Belgium for the 2012–13 season.

[4][5] In February 2017, Gjergja extended his contract with Telenet Oostende for another four years.

In September 2018, he was named the head coach of the Belgium national team.

[1] This biographical article relating to a Croatian basketball figure is a stub.