• Grain Crude Protein Concentration, the percent measure of protein found in grain foodstuffs.
• Global Precipitation Climatology
• Grace Covenant Presbyterian Church
• Gujarat Cleaner Production Center
• Gulf Coast Purchasing Cooperative
• granule-cell-Purkinje-cell, or gcPc, a type of cerebral "synaptic circuitry provides adaptive behavioral plasticity from vestibulo-ocular reflexes to eyeblink conditioning via associative learning

References