This species is native to areas in the coastal plain of Kenya and Tanzania.

[3] G. prasina inhabits forests, woodland and thickets of the coastal plain.

It has been found both close to the ground and higher in the canopy, where it is thought to use small branches as perches.

Its diet predominantly consists of insects, but it has been known to eat smaller lizards in captivity.

Mating behaviour consists of the male biting the female's neck, and intertwining tails.