From The Book of Days:

If Gibbon's sketch of St. George's career be correct, that martial hero owes his position in the Christian calendar to no merit of his own. Born in a fuller's shop in Epiphania, Cilicia, he contrived to ingratiate himself with those above him by servilely flattering them, and so gradually rose from his original obscurity. A lucrative contract for supplying the army with bacon, proved, under his unscrupulous management, a mine of wealth; but as soon as he had made his fortune, he was compelled to fly the country, to escape the consequences of the discovery of his dishonest practices. He afterwards became a zealous convert to Arianism, and made himself so conspicuous in his new vocation, that he was sent by Constantius to supersede Athanasius in the archbishopric of Alexandria. To satisfy his avarice, the pagan temples were plundered, and the pagan and Christian inhabitants taxed, till the oppression became unendurable. The people rose and expelled the ex-contractor, but he was quickly reinstated by the army of Constantius. The accession of Julian was the signal for retribution.

George and two of his most obnoxious adherents were dragged to prison by the exultant Alexandrians, where they lay for twenty-four days, when the impatience of the people refused to wait longer for revenge. The prison doors were broken open, the archbishop and his friends murdered, and their bodies, after being carried through the city in triumph, thrown into the sea. This death at the hands of the pagans made the tyrant a martyr in the eyes of the Arians, and canonization followed as a matter of course. When the Arians re-entered the church, they brought back their saint with them; and although he was at first received with distrust, the sixth century saw him firmly established as one of the first order.

Can't we celebrate St Adalbert of Prague instead?