Pawtrack now has a GPS that is designed specifically for cats and built into the collar. I will probably need to update this article after I learn more about these trackers and maybe even try one myself. For more information see:
Pet Collar GPS Tracking Device | Dogs | Cats | The PawTracker
A short-range radio collar may be a better way to keep an eye on your cat. These trackers periodically send out a beacon signal via radio waves. Radio collars are lighter and less obtrusive, so cats are more likely to tolerate them and less likely to give them the slip. The devices use free radio bandwidths, so there are no monthly fees à la GPS. The trade-off is precision. Radio collar signals convey relative distance and location, not exact coordinates. That means you'll be playing a game of "hot and cold" if you try to meet up with your wandering cat. Stand still and watch to see if your cat is on the move before beginning a headlong pursuit.
The best tracking devices and smart collars for cats
One of the most popular electronic tracking devices for people and pets is GPS—short for Global Positioning System. This technology uses a network of space satellites initially developed in 1973. If your cat has a GPS tracking collar, you can pinpoint his exact latitude and longitude. Most services provide information via cell phone or website and often charge monthly fees. One caveat: many GPS collars are too heavy for cats. As technology advances, hardware is getting smaller and more cat-friendly models should become more widely available (and affordable). Remote areas aren't always GPS-accessible, but that's becoming less and less of an issue.
Top 6 GPS Pet Collars of 2017 | SafeWise
A GPS pet tracker has become a necessity in today’s modern world. Losing your pets is awful and when it happens, it can be a very worrying time to say the least. However, what do you do when you lost your pet? Do you look around the local area or do you just wait for the animal to return? Well, unfortunately there are circumstances that occur where the pets do not return on their own and that is when you must jump into action. However, which tracking collars are the most effective, a dogs or a cat’s collar?When it comes to choosing a pet tracker, you need to consider a few things such as how suitable it is for the animal. You want to ensure the GPS pet tracker is able to comfortable go around the dog or cat’s neck (as it’s a collar) and that the pet is happy with it. For some animals they may take a little time to get used to the collar but if the dog or cat can’t get used to the collar there may be an issue so remove it. However, your pets shouldn’t be too uncomfortable with the tracker.