Hello Abhinaw,

There are 11 Government Engineering Diploma Colleges in Bihar :

• New Government Polytechnic, Patna
  
• Government Polytechnic, Gopalganj
• Central Institute of Plastics Engineering and Technology, Hajipur
• Government Women's Polytechnic, Patna
• Aryabhatta Knowledge University, Patna
• Government Polytechnic, Muzaffarpur
• Kameshwar Narayan Singh Government Polytechnic, Samastipur
• Tool Room and Training Center, Patna
• Government Polytechnic, Katihar
• Government Women's Polytechnic, Muzzafarpur
• Government Polytechnic, Tekari