When Al-Mansur was building the city of Baghdad he suffered from pains in his stomach and from impotency, and Georgios, the director of the medical college at Jondshapur, was recommended to him as the most skilled physician of the time. Accordingly, the Khalif directed Georgios and two of his pupils, Ibrahim and Serjis, to come to Baghdad, appointing Gabriel (Jebrayl), the son of Georgios, as director of the hospital in the place of his father.
Georgios cured Al-Mansur, and received from him three thousand ducats for his reward, along with a beautiful slave girl; the latter was, however, returned to the Khalif with thanks, and the remark that, 'being a Christian, he could not keep more than one wife.' From that moment the physician attained free access to the harem, and enjoyed high favour with the Khalif, who greatly pressed him in A.D. 770 to make a profession of Islam; but this he refused to do, and died shortly afterwards, in A.D. 771.
Before his death Georgios asked to be allowed to return to Jondshapur, to be buried there with his ancestors. Al-Mansur said, 'Fear God, and I guarantee you paradise.' Georgios replied, 'I am satisfied to be with my ancestors, be it in paradise or be it in hell.' The Khalif laughed, allowed him to return home, and presented him with ten thousand pieces of gold for his travelling, expenses.