Definition of "GPU"

(computer hardware) Initialism of graphics processing unit (an electronic circuit dedicated to generating graphics and displaying images).  examples

(aviation) Initialism of ground power unit (a ground mobile unit that supplies electrical power to an aircraft while on the ground, without needing to power up the engines or APU).  examples

(historical) Initialism of State Political Directorate (Государственное Политическое Управление, Gosudarstvennoye Politicheskoye Upravlenie). (the Russian secret police until 1934)