What does GPU stand for in aviation terminology?

In aviation terminology, GPU stands for Ground Power Unit. A Ground Power Unit is an essential piece of ground support equipment that provides electrical power to an aircraft while it is on the ground. This is particularly important when the aircraft's engines are not running, as it allows for systems like lighting, climate control, and electronics to function without draining the aircraft’s batteries.

Using a GPU helps ensure that pre-flight checks, boarding processes, and maintenance tasks can be performed efficiently without relying on the aircraft's own power systems. This equipment plays a critical role in the turnaround process for aircraft, contributing to on-time departures and overall operational efficiency at airports.

The other options do not accurately represent the function of a GPU in aviation. General Purpose Unit does not specify the context of power supply for aircraft, while Ground Performance Unit and Ground Power Utility are not standard terms used within the industry to refer to the equipment responsible for providing electrical power on the ground.