On January 17, 1969, Tau Gamma Sigma was founded by ten women from the University of the Philippines Diliman.
Successive batches followed until they reached fifty members from different colleges in UP Diliman.
[1] After the declaration of martial law in 1972, the shared office of Tau Gamma Phi and Tau Gamma Sigma inside UP Diliman was raided under an arrest-search and seizure order signed by then-secretary of defense Juan Ponce Enrile, which resulted in the confiscation of several subversive materials and documents.
[citation needed] The sorority's colors are gold, green, and black.
Its pillars are Fortis Voluntas Sororitas or Strength, Freewill, and Sisterhood.