GSM stands for the initials of the varieties Grenache, Syrah and Mourvedre, which is a commonly used blend in many parts of the world. T stands for Tempranillo, which is NOT something that is found very often blended with the other three. The three varieties were planted on a small parcel for experimental purposes along with our main variety Syrah. Grenache is fruit, Syrah is texture, Mourvedre is the backbone and Tempranillo brings it all together.