Export Google Maps Route to KML/GPX

GPS Visualizer will take a Google Map route (url) and convert to .gpx

"You can ignore most the options, just select Gpx and paste the Google Maps URL into the box labelled “provide the URL of a file on the Web” and then press the Convert button"

http://www.gpsvisualizer.com/convert_input

Guide http://bedsforcyclists.co.uk/articles/2014/04/13/how-to-plan-a-route-in-google-maps-and-export-it-to-gpx-your-phone/

To export a route to KML you'll have to use Google MyMaps.

• add a route to new or existing layer
• drag and drop the route to suit your needs
• Open the maps options menue (3 dots above the layers)
• Export to KML

You can then use any service to convert the KML to GPX. I prefer GPSies. (edit: now acquired by AllTrails)

I think that in the current version of G Maps (in desktop, May 2018), you can click on "my timeline" at the left sidebar which appears when you click on the three-bar menu symbol at left of the search bar. Then your timeline appears in a separate tab, where you can select a day with the date timeline at upper left to find the route or timeline for that day. then if you go to the settings gear symbol at lower right, there is an option to "export this day to KML". Is that helpful? I use this all the time to transfer field visits to QGIS or google earth and compare to spatial data on soils, climate, google earth images that give me a better overall view of the landscape versus what one sees walking or driving, etc.