My own build/fork of GBA4iOS that allows easy sideloading on iOS 9 and Xcode 7.
To install, run sudo gem install cocoapods; git clone https://github.com/jessemillar/GBA4iOS.git; cd GBA4iOS; pod install. Once the command completes, open the Xcode project in the directory, connect your phone, select it as the target, and build the project.
If you hit a linker error upon build, quit Xcode, reopen the workspace file, and rebuild.
If you encounter other issues, follow the instructions at the bottom of this site.
As a sidenote, this repository has been set up per these instructions:
