Gulzar Ahmed served as the 27th Chief Justice of Pakistan from December 2019 to February 2022. He was a part of the five-judge bench that had disqualified former Pakistan Prime Minister Nawaz Sharif in the Panama Papers case.
source https://www.jagranjosh.com/current-affairs/who-is-gulzar-ahmed-imran-khan-proposes-former-chief-justice-of-pakistan-to-be-caretaker-pm-1649140002-1