CGWin : Custom Google Info Windows

Given two geo-localized points (start and end of the route), I want to animate the drawing of the route between them. Do you know how if it's achievable with the Google map js v3 api? Thanks

Residencia Erasmus Gràcia is located 15 minutes away from Park Guell on foot and 30 minutes away Sagrada Familia and Casa Batló. The residence is well communicated by public transport, and it is located in a safe district, surrounded by shops, restaurants and bars, as well as cinemas, theatres or libraries.