GPCA may refer to:
General Purpose of California, a product development firm in the United States Government Polytechnic College Anantnag, Anantnag, Jammu and Kashmir, India Great Plains College Association, a college athletic conference that operated from 1963 to 1965 Green Party of California, a California affiliate of the Green Party of the United States Gulf Petrochemicals and Chemicals Association, represents the downstream hydrocarbon industry in the Arab states of the Persian Gulf Generalized Principal Component Analysis; see René Vidal (engineer)