I've noticed a lot of charters mentioning that they got Tabs from Songsterr lately. There sure is a lot of new stuff there, since the last time I looked.  If you want to extract the Guitar Pro Tabs, you have to join, but not pay (unless you want to.) You've got to switch to the old version, allow Flash in Settings on your browser, and hit Submit a New Revision, before you get the GPx you want, then download it.  Then you skip the upload after all. Bit of a fiddle, but it sure is worth it.  They

https://play.google.com/store/apps/details?id=com.songsterr