Unlike GNU (which uses copyright monopoly grants to enforce a distorted, socialist conception of intellectual property rights on its users, such as mandating by government force that all source code of derivative works be disclosed), the OpenBSD organization and developers are apolitical and do not use copyright laws to force their users to do anything, and their work is focused on security, simplicity, and usability for their own purposes.

GNU software has to be ported over to OpenBSD, and you can find these packages in the ports collection. It's a great OS for advanced users of UNIXlike systems.