The chief gaoler is one of the overseers of the dungeons in the Red Keep and answers to the King's Justice. He has authority over the chief undergaoler. The Chief Gaoler's chambers are located between the ground floor of the Traitor's Walk and the entrance to the dungeons.
The most recent Chief Gaoler of the Red Keep had been a cloth merchant who had purchased the office from Petyr Baelish during the reign of King Robert I Baratheon. After Robert's death, he sought to put Stannis Baratheon on the Iron Throne. For this, he was imprisoned on the orders of King Joffrey I Baratheon, together with his co-conspirators, known as the 'Antler Men', and used as a catapult projectile by King Joffrey during the early hours of the Battle of the Blackwater.