Gojković legally headed the party until 1 August 2022, when the Serbian ministry of public administration and local self-government ruled in favour of Mihailović.

The party contested the 2003 election in an alliance with New Serbia (NS) and won twenty-two seats; Gojković appeared in the forty-ninth position and was not chosen for a mandate.

[9] For the 2008 Serbian parliamentary election, the SPO joined the For a European Serbia (ZES) coalition led by Boris Tadić's Democratic Party (DS).

[17] He received the eighty-second position on the Progressive Party's Aleksandar Vučić–Serbia Is Winning list in the 2016 parliamentary election and was re-elected when the alliance won a second consecutive majority with 131 seats.

[25][26] Several SPO members, including Gojković, were expelled from the party in May 2017 after recommending that longtime leader Vuk Drašković step down from his position to become an honorary president.

He continued to caucus with the Progressive Party, noting the POKS's good relations with the SNS and with Serbian president Aleksandar Vučić.

[32] On 23 December 2021, a group identifying itself as the POKS presidency removed Gojković as leader on the grounds that his four-year term had expired in October.

[35] The group identifying itself as the POKS presidency announced on 28 December 2021 that Gojković and his prominent ally Mirko Čikiriz had been expelled from the party.

[36][37][38] Gojković's supporters rejected this announcement, stating that Serbia's ministry of public administration and local self-government had issued a statement the previous day identifying him as the party's only legitimate representative.

Gojković rejected this, saying that he received only minimal compensation for serving as a director (which he had reported in any event) and that it was not evidence of ongoing ties to the SNS.

[44] Gojković announced in February 2022 that his POKS group would contest the upcoming presidential, parliamentary, and Belgrade elections in an alliance with Dveri.

[48] Parandilović later charged Gojković with seeking to join Serbia's SNS-led administration and of surrendering his claim to the POKS leadership after the election, thereby allowing Mihailović to take over the party.