Uh, you could just sync the playlists (and the music, too, if you wanted) to Google Drive or Dropbox. Drive is the better option if you want integration.
Google Play Music (or any other music app) will then pick up the synced playlists
Google Play Music (or any other music app) will then pick up the synced playlists
From the original post.
Been there done that, waiting in a full sport gear in the room for a playlist to sync going around the fucking planet while being 1m apart.