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Abbreviation	Definition
GC	Ground Control
GC	Guidance Control
GC	GyroCompassing
GCC	Ground Communications Coordinator
GCC	Ground Control Center
GCCB	Ground Systems Configuration Control Board
GCCC	Ground Control Computer Center
GCCD	Guidance and Control Concept Demonstrator
GCCO	Ground Control CheckOut
GCCS	Geostationary Communication and Control Segment
GCD	Gyro-Compass, Desired Cluster Orientation
GCDC	Ground Checkout Display and Control
GCDCS	Ground Checkout Display and Control System
GCE	Ground Checkout Equipment
GCF	Ground Communications Facility
GCHX	Ground Cooling Heat Exchanger
GCIL	Ground Command Interface Logic
GCIL	Ground Control Interface Logic
GCILC	Ground Command Interface Logic Controller
GCILU	Ground Control Interface Logic Unit

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