Jack Day (June 6, 1944 - March 29, 2021) was the nephew of George T. Miller through marriage, a former member of the facutly at Slippery Rock University. When Jack was growing up he and his brother were raised by his parents in the home of their grandmother Harriett Day, who was widowed. Anytime George T. Miller and his wife would visit with Harriett they would in turn visit with Jack and his siblings. Jack Day's widow, described George T. Miller as a loving man who took time to interact with Jack and his siblings. Jack Day held great admiration for his uncle and the things he was able to accomplish throughout his life. This admiration for his uncle is what lead him to decide to begin writing a book, which he was going to title, "They Also Serve". Jack was working on the research for the book until his death in 2021. His widow, Barbra Emmer Day dontated Jack's research materials to Slippery Rock Archives because of the connection with George T. Miller.

George Tasker Miller (May 10, 1891 – July 5, 1963) was born in Slippery Rock, Pennsylvania, to John C. Miller and Margaret Miller (Goodfellow).

Miller graduated from Slippery Rock Normal School in 1911. He received his bachelor of art degree from Carnegie Institute of Technology, Pittsburgh, and his master’s degree from the University of Pittsburgh.

Miller served in the Navy during World War I. His experiences during the war inspired him to start The Victory Bell, a newsletter created during his tenure at Slippery Rock Teachers College, where he served on the faculty from 1931 to 1947. He wrote The Victory Bell for students serving in World War II. The newsletter was mailed all over the world, reaching approximately 700 recipients. After WWII, many of the returning students showed their appreciation to Miller by presenting him with war memorabilia they had collected during their deployment. Many of these items are included in his collection in the Slippery Rock University Archives.

Prior to being the head of the Slippery Rock Art Department, Miller taught at Aliquippa High School and Peabody High School in Pittsburgh. After leaving Slippery Rock he went on to work for the Department of Education in Harrisburg, Pennsylvania. He was in charge of art education at public schools and state colleges.

Throughout his career, Miller traveled the world visiting art collections throughout Europe, Canada, and America. In 1950, Miller was sent to Cuba by the Department of Education in Washington, D.C. to survey their educational institutions.