Kamat is survived by his wife Maharookh and a son, Sunil, said a close family friend.
An advocate by profession, Kamat was a commerce graduate from R.A. Podar College, Mumbai and had a law degree from the Government Law College, Mumbai.
He was a Member of the Parliament for the Mumbai North West constituency of Maharashtra in 2009 and Mumbai North East constituency of Maharashtra in 1984, 1991, 1998 and 2004
He had also served as the Minister of State for Home Affairs with an additional charge of Minister of Communications and Information Technology during 2009 to 2011.
In a condolence message, Maharashtra Congress spokesperson Sachin Sawant said "a very dynamic and renowned face of the Congress and a great leader Gurudas Kamat is no more".
Normally hale and hearty, Kamat on Tuesday night tweeted his Bakri Eid greetings to all saying: "Eid Mubarak to all my friends celebrating Eid-Al-Adha. May all your prayers be accepted. May peace, joy and happiness never depart from your lives and homes."