I mean, where should my hardware sent the coordinate data and how the way my web-based app take the data and render-it into Gmaps.
Do I get that correctly: You want us to do the web application for you? The Google Maps API documentation tells you how you could integrate Google Maps into your web application, there are thousands of tutorials on the Internet how to create a web application with all the toolkits and frameworks available. This forum is not a programming service, it will help you if you have a problem but you have to do the work.