He was on the electoral list of the Movement of Free Citizens, People's Party and Dragan Đilas for the 2018 Belgrade City Assembly election.

[5][6] On 3 April 2022, during the general election, Grbović was attacked by the ruling Serbian Progressive Party (SNS) activists near their local board in Nova Galenika, Belgrade.

[8] In April 2024, PSG left the Party of Freedom of Justice (SSP)-led parliamentary group.

[11] He is a critic of the Russian influence in Serbia[12] and supports sanctioning Russia due to its invasion of Ukraine.

[13] Grbović supported the signing of the Ohrid Agreement between Serbia and Kosovo which aims to normalize diplomatic relations between the two parties.