I don't see why, GPL doesn't require you to submit your modified GPL code back to the project, it only requires you to make the code available to others. All GP

I don't see why, GPL doesn't require you to submit your modified GPL code back to the project, it only requires you to make the code available to others. All GPL cares about is keeping the code available and if a GPL project uses some code from a BSD-licensed project, it also makes that BSD-licensed code available as part of the GPL project (of course the entire project is now GPL, but in theory if you can rip out the BSD code without any GPL bits or modifications, you can use it under the BSD license).