I kept G Tiles many years ago buying them as freshwater from a freshwater tank. I got two and they struggled in fresh but I moved them to brackish and they thrived and got some beautiful markings in the end. super active and very greedyThis species is called Indian mud eel/Indian mud moray eel/freshwater moray eel(Gymnothorax tile)
They're more of a brakish species but they do live in freshwater
As for keeping brakish tank is the most suitable cuz they tend to get stressed in fully freshwater
Indian mud moray eel - Wikipedia
en.m.wikipedia.org
InterestingThere is a freshwater moray called Gymonothorax Polyurandon. I've had mine just over a year rarely see much of its head but a lovely thing when you see it venture out. major escape artists too and seemingly fully freshwater