Patrick was 100 years of age or older at the time of his death. His obituary in the Kentucky Gazette read:

Lexington, October 10 (1805), Died on Tuesday morning last, Mr. Patrick Gullion, a citizen of this town. The age of Mr. Gullion was not known to any person in this place; but it has been considered as considerably upwards of 100 years. He has been a citizen of Lexington for about 20 years; and when he first came here was called a very old man.

He probably had more than one wife and several children but we have only found proof of his oldest son Henry who was surely in his 80s in 1803. Patrick had at least one son, Henry. Henry also probably had more than one wife and several children, but we only know of his two eldest sons, Edmund and Edmund P. The later used only the name Edmund after his older brother died about 1803. Edmund and Edmund P. must have been very close to their father Henry and grandfather Patrick as all lived close to each other in Pennsylvania and Kentucky.

In 1764 Patrick was probably living close to Edmund when his grandson, Robert, was born on the banks of the Potomac River near Ft. Frederick. By 1773 he apparently had moved to Hempfield Township, Bedford County, Pennsylvania since he was on the tax list there. About 1786, he came to Kentucky with Henry and his grandsons, Jeremiah, John, and Robert, plus George, Nathaniel, Edmund and Edmund P. From 1788 to 1803 he appeared on the tax lists in Franklin County, Kentucky with the notation "very old man."

On August 10, 1796, Edmund purchased a home where Patrick lived on Mulberry Street (now Limestone Street) in Lexington, Kentucky. Edmund died, left the house to his father Henry. On February 15 1803, Henry gave the home to Patrick and Mary Gullion with the understanding that it would pass to his next oldest son, Edmund P., at their death.