Import gpx files from your Garmin into Google Maps to document your stages [BLO005]

When cycling I noticed lot's of bikers having a GPS computer mounted on their handlebar. These devices record speed, elevation, heart rate, power, cadence and record even cycling track. But what if we could visualise these cycling tracks in Google maps? We could place on these tracks placemarks, commentary text, links and pictures to document the cycling journey. Journey we could share with fellow bikers through a website or on social media ?