There are a few different types of GPS trackers for dogs. Each of these devices attach to the dog's collar and must have GPS communication services available.
One type of GPS tracker for a dog uses radio transmissions. The owner has a handheld device that shows a map of where the dog may be located. Another type of tracker requires Internet access through a computer or smartphone. Owners access the attached tracker and locate the missing dog by using an interactive map shown in real-time. Some trackers allow owners to receive notifications via email or text message if their dog crosses over a specific boundary.