[3] Besides Little Helper, he also has a "thinking cap", a hat shaped like a combination of a rooftop and a nest, with three black birds living inside it.

In some stories, Gyro's primary rival is Emil Eagle, although he is also antagonized by the Beagle Boys and Magica De Spell.

Gyro made his first animated appearance in a 1980s full-length movie, the Sport Goofy in Soccermania television special, with only one line of dialogue, voiced by Will Ryan: "Scrooge parting with a million dollars?"

In the subsequent 1987 animated series DuckTales, Gyro became a regular character, with Hal Smith supplying his voice while Barry Gordon records it in several episodes.

Among Gyro's noteworthy inventions in the series was the creation of the GizmoDuck suit, intended to be worn by a security guard for Scrooge McDuck's Money Bin.

In the Toontown universe, Gyro created a robot that, when Scrooge accidentally wired it incorrectly, made the Cogs, the main antagonists of the game.

So, to take care of the infestation, the Toons (the main protagonists of the game) destroyed them with gags such as squirting seltzer water and throwing pies at them.

A reimagined Gyro appears in the 2017 reboot of DuckTales (voiced by Jim Rash), in which he maintains a lab below Scrooge's Money Bin.

This Gyro merges characteristics of his harsher, early comic book self with those of his original DuckTales counterpart along with adlibbing by Rash; the result being an eccentric who struggles with social graces and has a short temper, yet still retains a good nature and makes efforts to stop his inventions from harming people.

He also has a track record of inventions gaining sentience and becoming evil, though he argues that some of them are merely misunderstood (a trait that the show creators have also attributed to Gyro himself).

In season one's subsequent episodes, he took on Fenton Crackshell-Cabrera as an intern, clashed with Scrooge's rival Mark Beaks, and forced Donald Duck to swallow a voice modulator.

In the season 2 premiere, he uses a modified shrink ray invention to communicate with a microscopic civilizations in the McDuck household, only to be taken hostage when he attempted to become their god-king.

Gyro built a child-like defense drone named 2-BO and treated him like a real boy, but Akita tampered with his programming before using him to terrorize the city of Tokyolk.

Created by Don Rosa, he was first mentioned in Guardians of The Library in Uncle Scrooge Adventures #27[7] as the inventor of The Junior Woodchucks Merit Badge, as well as the first person it was awarded to (for inventing it).