Green tree frog is a common name for several different tree frog species:

• American green tree frog (Hyla cinerea), a frog in the family Hylidae found in the southern United States
• Australian green tree frog (Litoria caerulea), a frog in the family Hylidae native to Australia and New Guinea
• Emerald green tree frog (Rhacophorus prasinatus), a frog in the family Rhaco to northern Taiwan

• GTF (disambiguation)