George Taylor was a Presbyterian.
He was identified as a Presbyterian by the Presbyterian Historical Society and the Presbyterian Church, USA. (Source: Ian Dorion, "Table of the Religious Affiliations of American Founders", 1997).
From: B. J. Lossing, Signers of the Declaration of Independence, George F. Cooledge & Brother: New York (1848) [reprinted in Lives of the Signers of the Declaration of Independence, WallBuilder Press: Aledo, Texas (1995)], page 123:
George Taylor was born in Ireland, in the year 1716, and came to this country when he was about twenty years of age. He was the son of a clergyman, but whether Roman Catholic or Protestant, is not known.
From: Robert G. Ferris (editor), Signers of the Declaration: Historic Places Commemorating the Signing of the Declaration of Independence, published by the United States Department of the Interior, National Park Service: Washington, D.C. (revised edition 1975), pages 137-138:
When Taylor was about 20 years of age, he indentured himself and emigrated from northern Ireland, where he had been born in 1716, to Pennsylvania... In 1768 his wife died; he subsequently sired five children by his housekeeper out of wedlock...
...his death at the age of 65 in 1781... Originally buried in the church yard of the German Evangelical Church at Easton, his body was later moved to the Easton Cemetery.