Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym GYY is...

GYY is

  • Chicago Gary Regional Airport, Gary, Indiana USA

GYY is also in:

Acronym Definition Searched: BAVW SDJ TPA WAIW TC WAK 61739 DOR VNE MAR OTA CTAS EISS OMB TEA ANI