GR may refer to:
Grey's Anatomy is an American medical drama television series that premiered on March 27, 2005, on the American Broadcasting Company (ABC) as a mid-season replacement.
The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States.
The Greek alphabet has been used to write the Greek language since the late ninth or early eighth century BC.
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of 209,331 km2 (80,823 sq mi), it is the largest of the British Isles, the largest European island, and the ninth-largest island in the world.
Greek (Modern Greek: ελληνικά, elliniká) is an independent branch of the Indo-European family of languages, native to Greece, Cyprus and other parts of the Eastern Mediterranean and the Black Sea.
A greenhouse gas (sometimes abbreviated GHG) is a gas that absorbs and emits radiant energy within the thermal infrared range.