If you select this option, SailGrib will create a GPX file of the calculated routing. The file is saved by default in the sailgrib/gpx directory of your SD card or internal memory. You can choose the directory in which this file is saved.
This file can be downloaded to most GPS and OpenCPN. Be careful, SailGrib WR is only a planning tool for your navigation, some points of the route can be on land as the shoreline might not be precise enough.