The indictment, drawn up by the Zagreb County Prosecutor's Office, charges Gojak with having shot dead the 14-year-old Danijela Roknic and Dragica Ninkovic when he raided, together with a group of unidentified members of the Croatian National Guard Corps (ZNG), the family house of Marko Roknic, Danijela's father, in the residential area of Sajevac in Karlovac on 5 October 1991.
Although the police suspected Gojak also of murdering Marko Roknic, the indictment alleges that an unidentified member of the ZNG group was responsible for his death.
According to the indictment, Gojak committed this war crime while defending the city of Karlovac against attacks from Serb paramilitaries and the then Yugoslav People's Army.
The first hearing in the trial is likely to be scheduled for early 2011.
The case was opened when the two surviving members of the Roknic family -- Marko's wife Branka and their son Nenad -- who now live in Serbia, gave their statements about it to the Serbian war crimes tribunal in Belgrade.
The case was transferred to the Croatian judiciary, and Gojak was arrested on 25 May this year.
According to the testimony of Branka Roknic and Nenad Roknic, four armed men raided their home on 5 October 1991, and the Roknics recognised two of them as their neighbours.
The remains of the killed members of the Roknic family were exhumed at the Popovic Brdo cemetery near Karlovac this year.