GCS
GCS stands as an abbreviation for:
- The Greek Christian Writers , a series of publications
- Gauss Center for Supercomputing , the merger of the three national high-performance computing centers in Stuttgart, Garching and Jülich
- GCS Cars , former British car manufacturer
- Geek of Computer Science , see also Geek Code
- Glasgow Coma Scale , a scale used to estimate impaired consciousness
- GNU Coding Standards
- Ground control station , see ground control station
- γ- glutamate cysteine ligase , the first enzyme in glutathione synthesis
- Google Cloud Storage , a REST file hosting web service for storing and retrieving data on the Google Cloud Platform
GC-S stands for:
- Chrysler GC-S , a 1971 car model