The Greek system at Texas A&M was born in 1974. Slowly, organizations joined in and in 1978, the Greek system had grown to seven fraternities and five sororities. In the fall of 1980, three men by the names of Arnold Weil, Mark Stromberg, and Peter Loftspring sought to have a brotherhood of their own, and began planning the steps to forming a new fraternity at Texas A&M. After mustering fifteen eligible men, the Sigma Alpha Mu National Fraternity granted them a charter as the new Gamma Kappa Colony, the ninety-ninth chapter in the Sammy national system. The chapter quickly grew, and was granted a charter within a year of its inception.

Fraternity life at Texas A&M was small during these times, and this reflected the size of the Gamma Kappa Chapter at the time, which sat at about thirty members maximum during its height in the mid-1980s. Members of Gamma Kappa stood strong alongside other Interfraternity Council Chapters members in successfully litigating Texas A&M over not recognizing fraternities, to which now are an integral part of our university. The times did not last forever, and financial issues struck the chapter in 1992, to where the Gamma Kappa Chapter would temporarily become inactive.

Although gone, the foundation of Sigma Alpha Mu at Texas A&M was still present. In the fall of 2003, a group of men sought to form a new brotherhood. By this time seventeen fraternities were present at Texas A&M, and the culture was greatly changing. Similar to before, enough men were mustered to form a colony, and the Gamma Kappa Colony was rechartered in the spring of 2003 with an overwhelmingly supportive Interfraternity Council vote of 16-1, with their Alpha class of eight men. 

On April 17, 2004, this group received their formal charter and continued to grow as a full fledged chapter. The first elected president, Robert Wolf, and his council began the process of regrowing the chapter to where it is today. From there on Sammys have been involved in all facets of campus life, ranging from Student Senators, Interfraternity Council Executives, and even Division 1 Athletes, as well as countless other leadership roles in other organizations. The chapter GPA is consistently higher than both the Greek mens average and the campus mens average, typically Gamma Kappa has the highest or within the top four GPA averages on a yearly basis.  

In the spring of 2017, Gamma Kappa history was made when the active members signed on a new house, the largest at Texas A&M by capacity, and with it the ability to truly live in a fraternal manner alongside brothers. From this point on Sammy will continue to expand, and continue to offer a close social and fraternal union for Aggies of all backgrounds.