The latest packaged sources and official binaries are always available on our SourceForge project page.
Check the project page for new Android builds.
A jail-broken device is required. Find the package and instructions on the iOS installation page.
git clone git://github.com/gemrb/gemrb.git
git clone firstname.lastname@example.org:gemrb/gemrb.git
If you plan to submit a pull request, log in to GitHub, visit our page there (first link), fork the repository and then clone your fork. Once you push your changes to your fork, you can easily create a pull request through the web app.