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Tau Gamma Sigma also known as the Triskelion Grand Sorority, is a sorority founded at the premier state run and owned educational institution in the Philippines, the University of the Philippines on January 17, 1969. An affiliated sorority of the Tau Gamma Phi, also known as the Triskelion Grand Fraternity. It is considered as one of the most dynamic sororities in the Philippines today. 

• Tau Gamma Sigma 41st Founding Anniversary at Bahrain
• TGS 1969 Banner
• STEP-QC
• TGS iN Marawi City Council
• Tau Gamma Sigma 40th Anniversarry @ Marawi City Council