Robba signed a one-year deal at the Launa Windows Stadium in the summer after impressing player-manager Kevin Nicholson whilst on trial.
The 24-year-old has won seven caps for his country, and has previously played in Gibraltar, France and Spain.
Gibraltar play a friendly match against Portugal on September 1st at the Estadio Do Bessa in Portugal, before taking on Greece at the Estadio Do Algarve in a World Cup Qualifier on September 6th.
(Photo: Pinnacle)