I want to prepare for gate(in electrical) exam for 1 year.which classes are best for me in bombay and hydrabad or in any other city?

I currently doing B.E in 4th year in electrical engineering in GUJARAT. i want to make M.TECH in IITs or NITs. i am ready to make a preparation for GATE seperately for 1 year. so where & which classes are most suitable for me.I am ready to go for anywhere in india for preparation.