The Gray-bellied Limnomys lives in the mountains of Mindanao, Philippines. Its fur is long and soft, and records come from montane forest at 2,250–2,800 m.
The coat is long, thick, and soft. The yellowish-brown back is darkest along the middle, the sides are paler, and the belly is grayish white.
On Mount Kitanglad, Mindanao, it was trapped in montane mossy forest under logs, near burrow openings, and among roots. Stomach contents included seeds, fruit pulp, plant tissues, arthropods, and earthworms.
An extinction-risk assessment has not been added yet.