Yes

But we're interested in the St George who was the Red Cross Knight and Patron Saint of England, and who replaced Edward the Confessor in the 14th Century as Wilfried has said.

This is it, from one of the web sites above (which is more accurate than most).

The life of Saint George is shrouded in legend, so much so that it is quite difficult to untangle fact from fiction. Much of the problem lies in the Acta Sancti Georgii (Acts of Saint George) written at a very early date and outlawed by Pope Gelasius in AD 496. Meanwhile the Greeks also had a set of Acts which were more accurate and quoted by Saint Andrew of Crete.

From them and the writings of Metaphrastes, we can piece together that he was born in Cappadocia of noble, Christian parents and on the death of his father, accompanied his mother to Palestine, her country of origin, where she had land and George was to run the estate. He was martyred at Lydda in Palestine (Nicomedia). He held an important post in the Roman army - the rank of tribune, or perhaps colonel in modern terms - during the reign of the Emperor Diocletian (245-313). Dioclesian was a great persecutor of Christians (from about 302) and when the persecutions began George put aside his office and complained personally to the Emperor of the harshness of his decrees and the dreadful purges of Christians. For his trouble, though, he was thrown into prison and tortured. He would not recant his faith however and the following day he was dragged through the streets and beheaded. It is uncertain whether he also tore down the Emperor's decrees as they were posted in Nicomedia. So he was one of the first to perish. The Emperor's wife, Alexandria was so impressed at the Saint's courage that she became a Christian and so too was put to death for her trouble.

The cult of Saint George goes back a long way - certainly to the 4th century. The Syrian Church held him in great esteem. The church of Saint George In Velabro - (The Veil of Gold) - Rome, dating from about that time was built. Saint Clothilde, in Gaul dedicated a church to him; in Venice, he is the second patron after Saint Mark; the Greeks hold him in honour. And in 1222 the Council of Oxford appointed 23rd April as his Feast Day. He became the English Patron Saint in 14th Century and he became associated with the Order of the Garter.

The connection with England, as with other nations and states that chose George, is simply that the cult was imported with the crusaders

Cheers!
Ian