What Is GSM Wine? Grenache, Shiraz, Mourvèdre Explained

GSM is a red wine blend made from three grape varieties: Grenache, Shiraz, and Mourvèdre. The name is an abbreviation of the three varieties in their typical order of dominance in the blend. Australia, particularly the Barossa Valley and McLaren Vale in South Australia, produces some of the world's finest GSM wines, dr