To be honest this is one of my projects I have been working on for fun at https://fleet-track.org/ I have been working on this one as well as pi-auto (A raspberry pi gps device for the car that sends it data to flee-track.org) that go hand in hand.
Fleet-track.org is a site that you can sign up and send your gps data and it will display map as like below. If you have muliple devices it will also track that device too
We also have a screen to show where your current gps devices are and a blog to help you get started
Currently working on new features for the website & pi-auto. Some more display screens and more blogs and how to guides on how to get started and using this site.
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