The Osijek network is the only Croatian tram system still in existence outside Zagreb.

The present network consists of two lines which intersect in the city square (Trg Ante Starčevića) and the fleet consists of refurbished Tatra T3 PVO vehicles and some newly acquired second hand Duewag GT6.

During the Croatian War of Independence, five Tatra T3 streetcars were destroyed and two female drivers were killed in 1991/92.

A 2018 reorganization of public transport which abolished the tariff union between GPP and the private transport operators reintroduced the city centre circulator, connecting the main square and the city's railway station.

In September 2023 GPP Osijek ordered 10 new low-floor trams from Končar, the deal was for 25 million euros.