GY, Gy, or gy may refer to:
Gynecomastia is a common disorder of the endocrine system in which there is a non-cancerous increase in the size of male breast tissue.
Gymnastics is a sport involving the performance of exercises requiring balance, strength, flexibility, agility, endurance and control.
A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a spinning wheel or disc in which the axis of rotation is free to assume any orientation by itself.
Gyeonggi-do (Hangul: 경기도, Korean pronunciation: [kjʌŋ.ɡi.do]) is the most populous province in South Korea.
Gyeongju (Korean: 경주, pronounced [kjʌŋ.dʑu]), historically known as "Seorabeol" (Korean: 서라벌, pronounced [sʌ.ɾa.bʌl]), is a coastal city in the far southeastern corner of North Gyeongsang Province in South Korea.
Gypsy is a 1959 musical with music by Jule Styne, lyrics by Stephen Sondheim, and a book by Arthur Laurents.
Gyumri (Armenian: Գյումրի [gjumˈɾi]) is the second largest city in Armenia and the capital of the Shirak Province in the northwestern part of the country.
Gyeongbokgung (Hangul: 경복궁; Hanja: 景福宮), also known as Gyeongbokgung Palace or Gyeongbok Palace, was the main royal palace of the Joseon dynasty.
György Sándor Ligeti (/ˈlɪɡəti/; Hungarian: Ligeti György Sándor, pronounced [ˈliɡɛti ˈɟørɟ ˈʃaːndor]; 28 May 1923 – 12 June 2006) was a Hungarian composer of contemporary classical music.