As you want to do graduation in guitar for that you want to get some good Collages in Delhi so here I am giving you some colleges:

Spin Gurus DJ & Remixing Academy
A-7, Saraswati Vihar, Pitampura,
New Delhi – 110034, India
Phone: + 91-11 – 27027111, 27027444

School of Symphony
1) 857, Pocket 3, Sector 19,
Dwarka, New Delhi – 110075
Phone: +91-9891725153, 011-42770154, +91-9717535765
2) B-66, Dayanand Colony,
Lajpat Nagar IV, New Delhi – 110024
Phone: +91-9711333298, +91-8800846131

Saraswati Music College
A-1/226, Safdarjung Enclave, New Delhi – 29
Phone: 91-11-26167911/ 91-11-26105611/ 91-11-26167922
Fax: 91-11-26194525

Sangeet Niketan
2666, Ballimaran, Chandni Chowk, Delhi – 110006
Phone: 91-11-22456736/ 91-11-22522818

Ramjas College
University Enclave, Delhi-110007, India
Phone: (91 11) 27667706
Fax: (91 11) 27667447

Daulat Ram College
4. Patel Marg, Maurice Nagar,
Delhi-110007, India
Phone: 011 – 2766 7863
Fax: 011 – 2766 6990

Indraprastha College For Women
31, Sham Nath Marg, Delhi-110054
Phone: (011)-23954085, 23962009
Fax: 011-23976392

Shriram Bharatiya Kala Kendra
1 Copernicus Marg, New Delhi – 110 001
Phone: 23387132, 23386428 / 29
Fax: 23387132

Some Music classes in Delhi for Guitar:

Saraswati Music College, Safdarjung Enclave
Safdarjung Enclave, Delhi

Tansen Sangeet Mahavidyalaya, Safdarjung Enclave
Safdarjung Enclave, Delhi

Passion - The Music & Dance Classes, New Delhi H.O.
New Delhi H.O., Delhi

Tansen Sangeet Mahavidyalaya, Tilak Nagar
Tilak Nagar, Delhi

Hansdhwani Music Academy, Tilak Nagar
Tilak Nagar, Delhi

Harmony Sangeet Academy, Dwarka
Dwarka, Delhi

Symphony Music Academy, Ashok Vihar Phase 1
Ashok Vihar Phase 1, Delhi

Tansen Sangeet Mahavidyalaya, Kalkaji
Kalkaji, Delhi

Shri Ram Bhartiya Kala Kendra, Connaught Place
Connaught Place, Delhi

Shri Mohan Deva Ashram, Jamia Nagar
Jamia Nagar, Delhi

Learn Guitar, Shakurpur
Shakurpur, Delhi