Johan, thxs and I am sorry to bother you sooo much with it but I am afraid you are not very clear (not you, your site, at least for people like me - novices).
For instance, my brother just downloaded the GpsGate, paid 7.5 euros (plus VAT) and can see and follow his track on gpsgate.com. So he has access to a solution, nothing really to do with his computer but he enjoys at the moment your service from your site, gpsgate.com. Are you calling this "hosting his server"?
I understand you are busy, it's OK if you don't answer and end this topic, I am just very confused and others might be as well.