The Gepple-Gyro is an invention that appears in the animated series The New Adventures of He-Man.
Gepple-Gyro was an invention of Gepple's that was part of Alcon's Guidance System as invented by his colleague Alcon. In fact, according to Gepple, the Guidance System's success was mainly due to his addition. Alcon's Guidance System was installed into the cockpit of the Starship Colossus. With this addition to the flight control, Captain Hydron only had to punch in the coordinates and could then sit back and enjoy the flight.
Unfortunately, the Guidance System began to malfunction when Alcon tried to ascertain from it how much time they had left to get to their destination, Gorn City on the planet Denebria. Gepple whipped out a screwdriver to take a look at the machine, saying that it was probably a loose Dorfus Bolt that was causing the problem.
The machine promptly exploded, leading the ship to go off course. Gepple and Alcon began blaming each other for the fault in the machine, and Alcon even began to deny inventing it in the first place.