通れた道マップ GPX拡張 is a free Chrome add-on that adds the functionality to load and display GPX files on the TOYOTA's "通れた道マップ" (Passable Road Map).

With this add-on, users will be able to load GPX files by clicking on a button located at the bottom left corner of the "通れた道マップ" screen. Once the GPX file is loaded, the add-on will display the route and waypoints on the map, allowing users to easily check passable areas and road closures.

This extension enhances the functionality of the "通れた道マップ" by providing users with the ability to import and visualize GPX files, making it a useful tool for those who rely on GPX data for navigation and route planning.

Please note that this add-on is specifically designed for the "通れた道マップ" and may not be compatible with other mapping platforms or browsers. It is available for free on the Chrome Web Store.