 WICHITA, Kan.--BUSINESS WIRE--Gerald OShaughnessy, the co-founder, former Chairman and second largest shareholder of GeoPark Limited GeoPark or the Company NYSE: GPRK today issued an open letter to the Board of Directors the Board of GeoPark. The full text of the letter follows: June 18, 2021 Dear Members of the Board: I am writing you now because I am deeply concerned that GeoPark faces two significant barriers to enhancing shareholder value: 1 Jim Parks general resistance to 