GTSM may refer to:

• The Generalized TTL security mechanism, a proposed Internet data transfer security method.
• The Gre Tai Securities Market, a foundation serving the OTC market in Taiwan.

• Kutenholz railway station
• Kuterastan
• Kuterintja
• Kute Station
• Kutezevo
• Kuteževo
• Kutfalva
• KUTH
• Kuthali
• Kuthalur
• Kutha meat
• Kuthannur-I
• Kuthannur-II
• Kuthenkuli
• Kuthenkully
• Kuthens
• Kuthiala Sheikhan
• Kuthiathode
• Kuthim
• Kuthiravattom Pappu
• Kuthiyottam
• Kuththu
• Kuthu
• Kuthukuluru
• Kuthus