On the Blender Artist forums I think there was also talk about trying to make an addon that is like the UE4 character animation/rigging tools plugin that's in maya. So that might have something to do with it as well? Could be for ways to automate the naming of bones to fit the setup for UE4.
I put that the wrong way. I'm more wondering what 'Unreal Modding' means. Does it mean UDK import/export? Or UE4? Or Unreal engine 1? Blender has a bit of a history of not understanding what game artists need outside of the BGE. I hope it means UE4, because I'm not sure a lot of people will use UDK going forward.
For the FBX stuff I know someone has been working on updating the exporter to be more UE4 friendly. Here is the github for that. https://github.com/mont29/blender-io-fbx Haven't tested it myself yet but it seems to be a step in the right direction. But I really don't think that Gooseberry seems to focus on anything that…