Choose the profile that best describes how you plan to use your Garmin GPS device. Basecamp will automatically detect your Garmin GPS device and prompt you to select a profile. Once Basecamp is installed, launch the application and connect your Garmin GPS device to your computer using a USB cable. First, you’ll need to download and install Basecamp on your computer. But did you know that you can also use your Garmin GPS device with Basecamp, a free software application that allows you to plan and organize your trips? Here’s a step-by-step guide on how to connect your Garmin GPS device to Basecamp: 1. If you own a Garmin GPS device, you know that it can be extremely useful for a variety of activities, including hiking, camping, and geocaching.