Gurung held his nerve in a closely-contested final against Vipin Rana to emerge a 17-16 winner at the Daivajna Samudaya Bhavana.
In the 63kg category, Yogesh Chandra Tiwari of South Zone scored a facile 11-7 win over his team-mate Rajil P to clinch the gold.
Results (all finals):
Men: 78kg: Saroj Gurung (SZ) bt Vipin Rana (NZ) 17-16. Bronze: Irshad Khan (CZ) and Abhishek Gupta (CZ).
63kg: Yogesh Chandra Tiwari (SZ) bt Rajil P (SZ) 11-7. Bronze: Manish Sanwal (CZ) and Hemraj Chouhan (WZ).
54kg: Sunil Kumar (TFI) bt Dinesh Babu N (SZ) 11-5. Bronze: Y Amarjit Singh (EZ) and Aamir Mohd (CZ).
Women: 46kg: Vandana Singh (CZ) bt M Belona Devi (SZ) 15-12. Bronze: Sushma N Chandanshive (WZ) and Jyoti Jangra (NZ).
Junior boys: 78kg: Mulla Khalid Jakir Husen (WZ) bt Sandeep (NZ) 12-11. Bronze: Vinod PK (SZ) and Dada Khalandar R Pattayath (SZ).
68Kg: Sumit V Chavan (WZ) bt Deepesh Vats (NZ) 18-8. Bronze: Vipin Krishnan V (SZ) and Raghavendra I Pujari (SZ).
59kg: Kailash Rawat (CZ) bt Aman Kumar (WZ) 14-11. Bronze: Vignesh S (SZ) and S Farhatulla (SZ).
51kg: Abrar Khan (WZ) bt Aamir Md (CZ) 18-7. Bronze: Sandeep Reddy A (SZ) and A Akash Singh (EZ).
45kg: Rajesh BS (SZ) bt Surendra Kumar Lal (CZ) 7-6. Bronze: Ajay Mourya (WZ) and Amar Kumar (CZ).
Junior girls: 59kg: Pooja (NZ) bt Rupa Kumari (CZ) 8-6. Bronze: Aishwarya M (SZ) and Shweta Kumari (CZ).
52kg: Isha Sinha (CZ) bt H Dolly Devi (SZ) 13-11. Bronze: Nayana Chandran (SZ) and Priya Tiwari (NZ).
46kg: Reshma Veru (SZ) bt Vandana Singh (CZ) 14-13. Bronze: Tasin Begum (EZ) and Suman Y Kamati (SZ).
42kg: Trupti K Tayade (WZ) bt Suchitra Singh (CZ) 17-15. Bronze: Lalitha Devi T (SZ) and Innocencia Nini Miranda (WZ).