Originally Posted by
johnny99
Google Maps just started offering turn-by-turn real-time navigation for bicycle routes. Google Maps also allows you to cache maps so you don't need a data connection.
This should not be confused with what the OP is trying to do. I believe he has obtained a GPX route from a website for a metric century ride that he wants to download to his phone for turn by turn directions. The latest Google Map revision provides biking directions, but you still enter the start and end points, not the entire route.
Still seems like OSMAND is the best app for turn by turn voice navigation of GPX routes.