When Ilarion died Grigorije also moved to Mount Sinai where he became a student of Roman who would later be known as saint Romil of Ravanica. Grigorije of Gornjak is author of the hagiography of Romil of Ravanica. Grigorije of Gornjak is also referred to as Sinait because he was also a monk at Mount Sinai. Because of the Ottoman expansion they decided to leave Mount Sinai.