I don't know if it's been mentioned yet but I use the link below. Create your route in google maps and paste the address into the "from web url" line about 2/3rds of the way down. Make sure GPX is selected as output. It will then generate a link for download of the GPX file and you'll need to transfer that to whatever device you use. I use a Nexus 7 Tablet with OSMAND+ but this works on whatever can read .gpx. I use dropbox to transfer so no need to plug anything in.