He is a young mathematician, newly awarded his Doctorate, and originates from Synnax. He has been invited to Trantor by Hari Seldon to join the psychohistory project. He meets Seldon shortly after arrival on Trantor, but is already under surveillance by agents of the Committee of Public Safety. Seldon reveals to him that psychohistory has predicted the fall of the Imperium to be unavoidable, and that exile to the remote planet of Terminus is in fact Seldon's real goal. Gaal is arrested, interrogated and eventually moves to Terminus to continue Seldon's legacy.