(pathology) Initialism of general paresis of the insane. / (pathology) Initialism of general paralysis of the insane. / (economics) Initialism of genuine progress indicator.

(politics) Initialism of Green Party of the United States.

(US politics) Initialism of Green Party of the United States of America.

(computing) Initialism of general-purpose input/output (a pin on an integrated circuit whose behavior can be controlled by the user at run time.)

plural of GPIO

(linguistics) Initialism of grapheme-phoneme correspondence.

plural of GPC

plural of GPS

Initialism of General Post Office. / Initialism of German patent office. / (US) Initialism of Government Publishing Office, formerly Government Printing Office.

present participle of GPS