Gy

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GY, Gy, or gy may refer to:

Units of measurement[edit]

  • Gray (unit) (Gy), SI unit of absorbed radiation
  • Giga-year, 1,000,000,000 years (non-SI)
  • Galactic year, the time it takes for the Solar System to orbit the Galactic Center

People[edit]

Places[edit]

Transport[edit]

Other uses[edit]