The Gamma Kappa Chapter was established at Arizona State College in 1954. The first among the bandsmen to become brothers were John E. Hoffman, Kit C. Kirby, Roger W. Ardrey, William A. Aurthur, Thomas L. Cleaver, Keith H. Gould, Josquin Leon Gurrero, Garvin Hanchett, Delbert L. King, Jack E. Hokanson, Dean J. Holland, Bernard T. Kenna, and Ray Turley. These young men were instrumental in promoting school spirit and musical excellence. 

In the early 1960s, there was a loss of communication between Gamma Kappa and Nationals. In the spring of 1963, Gamma Kappa stopped recording minutes and accepting new members. However, with Dr. Don Wolf's support (Gamma Kappa's sponsor at the time), the chapter regained its standing in the band program. 

In 1966, Arizona State College changed its name to Northern Arizona University. In the fall of 1969, Gamma Kappa and Alpha Chi (Northern Arizona University's Tau Beta Sigma chapter and Gamma Kappa's sister organization) started collaborating on big brothers and sisters to improve joint relations. Throughout the 1970s, Gamma Kappa continued to have a strong presence in Northern Arizona University's band program. 

Then, in 1983, the chapter won the Top Ten Chapter Award, and Dr. Wolf received the Bohumil Makovsky Award. The 1980s was a period of expansion and stability for the chapter. In 1986, Gamma Kappa and Alpha Chi organized the Carson and Barnes Five-Ring Circus to raise funds for the band. The circus was held in Flagstaff until the end of the 1980s, generating thousands of dollars for the band program.

In the 1990s, the chapter faced a unique challenge. There were only three active members at one point, which later dwindled to one. In the mid-1990s, Alpha Chi helped Mr. John McBride (the sole active member in Gamma Kappa) gradually grow the chapter. The chapter remained relatively small until 2003, when they initiated thirteen new members into Gamma Kappa with the Alpha Chi Rush Class. This significant class helped both Gamma Kappa and Alpha Chi to increase their presence in Northern Arizona University's band program.

The Gamma Kappa Chapter of Kappa Kappa Psi adheres to the principles of Honor, Integrity, Respect, and Leadership. Additionally, we follow a set of ten traits that should be upheld by all members, whether within or outside of fraternity activities. The chapter's goal is to enhance the band and music programs at Northern Arizona University while also striving for personal excellence.

The Ten Traits of a Gamma Kappa Brother:

Academic Integrity

Accountability

Appropriate Level of Involvement

Brotherhood

Leadership

Love

Musical integrity

Organizational Skills

Professionalism in Communications

Service-Oriented Mindset