They were formed in 1997 and the name GONG was an acronym of Građani organizirano nadgledaju glasanje meaning "Citizens organize to oversee voting", but in 2000 the organization changed its name to simply GONG. Prior to the local and the presidential elections in 1997, GONG was created at the initiative of the Coordination of organizations for the protection and promotion of human rights from across Croatia. However, the Election Commission of the Republic of Croatia did not allow GONG's observers access to the polling stations, saying their presence was not defined by the electoral law. The Organization for Security and Co-operation in Europe (OSCE) criticized the government for doing this and claiming it made the elections "free, but not fair". GONG and the Croatian Helsinki Committee appealed to the Croatian Constitutional Court, which responded positively the following year, after which they were allowed to monitor all later elections.
The European Commission's Directorate-General for Enlargement's Civil Society Development conference recognized GONG as one of the main good governance and democratisation organizations in Croatia.
- "News from the Field: Strengthening the capacities of the new permanent State Election Commission in the Republic of Croatia". United Nations Democracy Fund. 2008-01-23. Archived from the original on 2011-06-23. Retrieved 2011-12-02.
- "GONG: 10th Anniversary, But In Financial Problems". dalje.com English Edition. 2007-04-12. Retrieved 2011-12-02.
- "Annual reports - How it all started?". GONG. 2008-07-23. Retrieved 2011-12-02.
- "Priopćenje U-VII-833-1998: HHO i GONG – sudjelovanje promatrača u izbornom postupku" (in Croatian). State Election Commission of the Republic of Croatia. 1998-10-09. Retrieved 2011-12-02.
- "Supporting minority elections in Croatia". Organization for Security and Co-operation in Europe. 2003-05-19. Retrieved 2011-12-02.
- "Civil Society organisations - Croatia". "Civil Society Development in Southeast Europe: Building Europe Together". Brussels: Directorate-General for Enlargement (European Commission). 2009-11-25. Archived from the original on 2012-07-17. Retrieved 2011-12-02.
- Official website (in Croatian)