Gamay is a purple-colored grape variety used to make red wines, most notably grown in Beaujolais and in the Loire Valley.  Its full name is Gamay Noir à Jus Blanc. It was first mentioned around the 15th century. It has been often cultivated because it makes for abundant production; however, it can produce wines of distinction when planted on acidic soils, which help to soften the grape’s naturally high acidity.

Around 75% of Gamay comes from the Beaujolais region of France.

Source

https://en.wikipedia.org/wiki/Gamay