Like ONGC is there any other PSU recruiting in bulk? And similar to ONGC will there be any chance of an interview call on low gate scores ?

Bulk recruitment for PSUs do happen like NTPC and BhEL. Score of 700 and above will sureshot convert seats.
The above organisation have great brand name and have various designations available makibg them bulk recruiters.

However, low gatescores arenot accepted.
The cutoffs shared below for all PSUs under GATE score.

https://engineering.careers360.com/articles/what-are-gate-scores-for-psu-recruitment