GEOS license and App Store usage

[mobile-appz]

Is it possible to use this library for paid closed source iOS apps that are going to be released on the App Store? Preferably without having to open source the whole app. Have read that the nature of the GEOS license makes this debatable and wondered what your view is as other people here have mentioned app reviews in another context. Although I appreciate this primarily is a legal issue. Are there any examples of apps currently on the App Store using this library.