MVC4 with google maps api v3

My vote of 1: Please read the guidance about asking a question. Your question is very broad, how do you want to use googe api with MVC4? What have you tried - the fact you ask for source code is normally indicative of nothing? My guess is you haven't even tried Googling (protip, Google has lots of answers), which you should before you post here, we're all unpaid volunteers (barring a very few staffers who answer questions from time to time).