In 1548, Góis was named Guarda Mor (High Guardian) of the Torre do Tombo (Royal Archives) and ten years later was entrusted by the same Cardinal Henry to write the chronicle of Manuel I’s reign.
1548. aastal nimetati Góis Torre do Tombo (kuningliku arhiivi) "ülemvalvuriks" (Guarda Mor) ning kümme aastat hiljem tegi sama kardinal Enrique talle ülesandeks kirjutada Manuel I valitsusaja kroonika.