Newton Gearloose first appeared in the Gyro Gearloose story in 1960 by Vic Lockman in Walt Disney's Comics and Stories #308 as Gyro's nephew in a Disney comic titled Ting-A-Ling Trouble. He subsequently appeared in Walt Disney's Comics and Stories #309, as well as in Huey, Dewey, and Louie's Junior Woodchucks #1, 2, 49, and 50.
Newton is a fan of his uncle's work, and wants to be an inventor like him when he grows up. Newton is also a Junior Woodchuck, as well as a friend of Huey, Dewey, and Louie. In some comics, Newton is referred to as Giggy.
After the early 1970s, Newton ceased appearing in new North American Disney comics. He continued to be used in some Italian and Danish-produced Disney comics into the late 1990s.
There was a similar character in the DuckTales episode "Superdoo!", like Newton he was also in the Junior Woodchucks. Though his name is never spoken he does bear a physical resemblance to Newton Gearloose.