Saint Gordius (or Gordinus; died c. 315) was a Christian soldier in Cappadocia who was dismissed from the army, lived as a hermit for a while, then returned and made an open declaration of his faith, for which he was martyred. His feast day is 3 January.

The Roman Martyrology as of 1916 for the Third Day of January says,

At Caesarea, in Cappadocia, St. Gordius, centurion, in whose praise is extant a celebrated discourse, delivered by St. Basil the Great on the day of his festival.^[1]

The Monks of Ramsgate wrote in their Book of Saints (1921),

Gordius (St.) M. (Jan. 3)
(4th cent.) A Christian soldier of Caesarea in Cappadocia, who in the time of the Emperor Licinius, with other Christians, was dismissed from the army and thereupon retired into a solitude. Later, returning to the city, he, moved by his zeal in the cause of Christ, addressed the crowd, seeking to make converts. He was seized and, after trial, beheaded in some year between A.D. 314 and A.D. 320. An eloquent Panegyric preached by St Basil, in which he reminds his hearers that some among them had seen Saint Gordius die, has perpetuated his memory.^[2]

The hagiographer Alban Butler (1710–1773) wrote in his Lives of the Fathers, Martyrs, and Other Principal Saints under January 3,

St. Gordius,

Martyred at Cæsarea, in Cappadocia, was a centurion in the army, but retired to the deserts when the persecution was first raised by Dioclesian. The desire of shedding his blood for Christ made him quit his solitude, whilst the people of that city were assembled in the Circus to solemnize public games in honour of Mars. His extenuated body, long beard and hair, and ragged clothes, drew on him the eyes of the whole assembly; yet, with this strange garb and mein, the graceful air of majesty that appeared in his countenance commanded veneration. Being examined by the governor, and loudly confessing his faith, he was condemned to be beheaded. Having fortified himself by the sign of the cross, he joyfully received the deadly blow. St. Basil, on this festival, pronounced his panegyric at Cæsarea, in which he says several of his audience had been eye-witnesses of the martyr’s triumph. Hom. 17. T. 1.^[3]