Hello Sunil Ranjan,
Job through GATE depends on how many vacancy are to be filled on GATE Score. Although Approximately upto AIR 600 in OBC Category get job in PSUs such as ONGC, NTPC, GAIL, Power Grid etc. This year AAI has also notified about some vacancy through GATE 2018.
You can register for GATE College/ PSU Predictor on Carrees360 to check possibilities in PSUs.
Good Luck.

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