These, in turn, re-organized as a purely honors society under the name Gamma Sigma Delta in 1913, quickly adding additional chapters in 1914 and 1916.

Delta Theta Sigma went on to flourish as an agriculture professional fraternity, thus two surviving organizations came from the same Alpha chapter.

[1]: 3 Gamma Sigma Delta grew rapidly, adding approximately ten chapters each in the decades of the 1950s and 1960.

These three letters stand for the Greek words, Gaea, Syndesmos and Demeter, which in turn were chosen for their symbolism, which is further explained as, "The binding together of earth, the mother of all, and the practice of agriculture, and the arts relating thereto for the welfare of mankind.

[1]: 18 Students of Agriculture and related programs who rank in the upper two-fifths of the junior and senior class.

A provision was adopted at the founding of the society to allow honorary membership for faculty and experimental station staff who exhibit the characteristic of "an active spirit of investigation in agriculture.