Google maps API limitation

Hi Ravi and everyone,
I need a live plotting of GPS info on Google maps like how the RED BUS tracking works.But when I checked out the gmaps API, it has a limit on number of requests per day and also per second for free plan.So is there any other way to achieve live plotting on maps.I simply want to move the marker live without refreshing the page

Thanks & regards,

Me and my clients are using Google maps for live plotting. Still they havent crossed the daily limits yet. Its 25000 requests per day i think. Tracking on map only happens when customers want to track. They dont keep seeing it all the time. So you should be good to go and if you just pay a small amount, you will get lot many requests more. Its not that expensive.
Moving marker is very easy. Will make a video on it.