GPCA

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
 * 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 Rene Vidal