Roti Island snake-necked turtle (Chelodina mccordi)
pig-nosed turtle (Carettochelys insculpta)
black marsh turtle (Siebenrockiella crassicollis)
black pond turtle (Geoclemys hamiltonii)
red-eared slider (Trachemys scripta elegans)
painted terrapin (Batagur borneoensis)
There once was an alligator snapping turtle (Macrochelys temminckii) and a common snapping turtle (Chelydra serpentina), but it seems the alligator snapping turtle has been moved to Suraloka Zoo.
These are somewhat a incomplete and inaccurate list. The alligator snapping turtles (There are a pair) in Suraloka are most likely a brand new pair bought by the zoo or donated by private collector instead of being the same turtle that are displayed in Gembira Loka a decade ago. Are there ever any public confirmation of Suraloka having cooperation with zoos like Gembira Loka?