George William Gee was born on June 16, 1881, in Carleton County, New Brunswick, Canada, to Benjamin J. Gee and Velzora Sarrah DeMerchant. He grew up in a rural and economically challenged environment, working as a woodsman. George was illiterate, signing documents with an "X," and lacked formal education. His family background was marked by intermarriage and mental health issues; his parents were cousins, and several relatives had been institutionalized for mental illness. George himself exhibited odd and restless behavior, leading some to question his mental stability.

George and his cousin, Millie Gee, had a romantic relationship that lasted approximately four years. George became deeply attached to Millie, believing they were effectively married. However, Millie ended the relationship and moved in with her brother-in-law, Bennie Gee, to help care for his children after his wife left. This rejection deeply affected George, leading to increased alcohol consumption and erratic behavior.

On the evening of March 12, 1904, George visited Bennie Gee's residence in Homesville, Carleton County, carrying a borrowed Lee-Enfield rifle. He had been drinking heavily but appeared friendly upon arrival, leaving the rifle at the door. George spent the evening drinking and playing cards with Bennie. Around 3:00 AM on March 13, as he prepared to leave, Millie assisted him to the door. At that moment, George ominously stated, "I suppose you don't know that this is the night you're going to die." He then retrieved the rifle and fired at Millie. The bullet ricocheted off the door frame and struck her in the chest. George fired two additional shots at Bennie, missing both times, before fleeing the scene.

George walked a considerable distance to find a telephone and voluntarily called Deputy Sheriff Albion Foster to surrender. Millie was attended by three doctors but succumbed to her injuries on March 16, 1904, shortly after providing a deposition to Deputy Sheriff Foster.

George's trial commenced on April 26, 1904, at the Old Carleton County Court House, with Judge Tucker presiding. Attorney General William Pugsley prosecuted the case, while J. Chipman Hartley and T.C.L. Ketchum represented the defense. The defense argued that George was insane, intoxicated, and incapable of premeditation, suggesting a manslaughter conviction would be more appropriate. They highlighted his family's history of mental illness and his own erratic behavior. The prosecution contended that the crime was premeditated, citing George's statement before the shooting and his actions afterward. After 45 minutes of deliberation, the jury found George guilty of murder.

George was sentenced to death by hanging, scheduled for July 22, 1904. Due to local opposition, the execution rope had to be sourced from another town, as no local merchants would sell one. George was baptized into the Adventist Church shortly before his execution. The execution was carried out by hangman Radcliffe at Woodstock Gaol, with death pronounced 12 minutes after the hanging. George was buried in the Gee Flat Cemetery in Bath, New Brunswick, in the same grave as Millie Gee, marked by a shared plaque.