Use ForkHub account if available
ForkHub creates an account in Android with the GitHub access credentials.
Could this app use those for non-anonymous Gist and Pull Requests?
Since I'm already working on logging in to GitHub via OAuth, I don't think a second application would be necessary. The possibility of saving the response token as an Android account was also taken into consideration, but for now, it will be saved on the shared preferences.
Also, about the non-anonymous Gists, once authentication works, there will probably be a CheckBox stating something like "Anonymous Gist" (which will be disabled and checked if you haven't gone through the OAuth flow).
Someone may want to implement it @gsantner :P
I probably won't implement it myself since there are bigger issues to fix, but if someone wants to, I'll gladly merge.