Is it possible to track my mileage using GPS? GPS tracking is a feature that can be added by following these steps: Note: Continued use of GPS running in the background can dramatically decrease battery life. Read, How does GPS Tracking work?, before continuing Then access the TMM Store. Scroll down to the "Single Items" section and tap the "Add Mileage Tracking by GPS" row. When you are ready to purchase, tap the Buy button and follow the instructions.