I agree the connection is weak. The similarity is that both services provide a short URL for a resource. In the case of TinURL, it is a longer URL. In the case of gping.io, it is your vehicle.
Gimme a mulligan on the tagline and I promise to come up with something better :)
Why are people so hung up on the url? What's important is the information that you can access. Its like describing Facebook as a set of urls for people