Gee was born in Denbigh, Wales. At the age of fourteen he went into his father's printing office, but continued to attend the grammar school in the afternoons.
In 1837 he went to London to improve his knowledge of printing, and on his return to Wales in the following year, he threw himself into literary, educational and religious work. Among his publications were the well-known quarterly magazine Y Traethodydd ("The Essayist"), Y Gwyddoniadur Cymreig ("Encyclopaedia Cambrensis"), and Dr. Silvan Evans; English-Welsh Dictionary (1868), but his greatest achievement in this field was the newspaper Baner Cymru ("The Banner of Wales"), founded in 1857 and amalgamated with Yr Amserau ("The Times") two years later as Baner ac Amserau Cymru.
This paper soon became regarded as an oracle in Wales, and played a great part in promoting the nationalist and home rule movement in the country. In educational matters he waged a long and successful struggle on behalf of undenominational schools and for the establishment of the intermediate school system. He was an enthusiastic advocate of church disestablishment, and had a historic newspaper duel with John Owen (afterwards Bishop of St David's) on this question. The Eisteddfod found in him a thorough friend and a wise counsellor. His commanding presence, mastery of diction, and resonant voice made him an effective platform speaker. He was ordained to the Calvinistic Methodist ministry, at Bala in 1847, and gave his time and talents ungrudgingly to Sunday school and temperance work. Throughout his life he believed in the itinerant unpaid ministry rather than in the settled pastorate. When he died in 1898, his funeral was the most imposing ever seen in northern Wales.
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Gee, Thomas". Encyclopædia Britannica. 11 (11th ed.). Cambridge University Press. p. 549.
- Ieuan Wyn Jones - Y Llinyn Arian (1998)