Rubuta ci gaba don wannan sakin layi - A ranar 9 ga Mayu, 1967, an zabe shi Bishop na Verapaz, yana ɗaukar ofishin a ranar 11 ga Agusta mai zuwa. A wannan matsayin, ya jaddada aikin fastoci tsakanin al'ummomin 'yan asalin mutanen Maya. A lokacin yakin basasa da ke gudana a kasar
a cikin 1970s, Gerardi ya kasance mai karfi mai ba da shawara ga amincewa da harsunan 'yan asalin Guatemala, don inganta matsayin' yan asalin. Ya taimaka sosai wajen samun izini ga gidajen rediyo biyu don watsa shirye-shirye a cikin yaren Maya.