Gond defeated his nearest rival -- the Bharatiya Janata Party's Dharmu Gond by more than 20,000 votes, a senior district administrative official told IANS.
Three candidates were in the fray for the Nov 30 by-election.
The bypoll for the seat, reserved for Scheduled Tribes, was necessitated by the killing of BJD member Jagabandhu Majhi by gunmen Sep 24.