Hello.

Wow that is more than a good score I can say yes you do have opportunities for getting into PSU

These 10 PSU is recruiting Mechanical Engineering students through GATE 2019 Score

1. BARC

2. DDA

3. HPCL

4. IOCL

5. MDL

6. NPCIL

7. NTPC 

8. ONGC

9. VIZAG STEEL

10. WBSEDCL

for more details go through this reference link

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

Good luck.