Pip has many ways to maximize its battery life. One of these is to keep the GPS off unless it’s absolutely necessary. So, if your pet is in a “safe location”, near the base station or any paired phone, the GPS will stay off.
If you want to test the GPS, you can take turn off bluetooth on your phone and take your pet for a walk well beyond base station range. When you get out of range, you should see an alert and then you can tap on the map icon to see your pet’s location as a red dot on the map.
Here is a brief video detailing how the map feature works: