Viliame "Bill" Rogoibulu Gavoka (pronounced [βiliame roŋoimbulu ŋaβoka]; born 8 July 1950) is a Fijian politician and Cabinet Minister.

From 28 November 2020 to 2022 he was leader of the Social Democratic Liberal Party, after ousting Sitiveni Rabuka in the SODELPA leadership contest.

[16] On 9 December 2020, SODELPA MP's voted to install Ratu Naiqama Lalabalavu as leader of the opposition rather than Gavoka, causing further tension in the party.

[17][18] During the 2022 election, SODELPA won three seats but became the kingmaker as neither FijiFirst nor the National Federation Party-People's Alliance coalition obtained a majority.

[27] Gavoka's daughter, Ela married Fiji's attorney general, Aiyaz Sayed-Khaiyum, a wedding which he did not attend.