Convert a JS powered google map script from google map v2 to v3

We have a maps API which plots the routes of multiple vehicles on a Google Map. It uses a lot of Google classes like GIcon, GMarker, GSize, GPoint, GLatLng, GPolyLine etc. We need this to be converted to v3 of Google Maps because v2 is no longer working. We need this done quickly. I will share code as well as access to the application once I have found/selected a worker. If you need access to the JS file before placing the bid, please ask via a PM. Please do not send generic bids and please mention v2v3 in your bid comment so I know you have read this.