Read above please. You cannot import GPL code into BSD licensed code without restricting the code distribution. In the other direction, you can do it and just add a notice about the license. It does not add restrictions to the distribution. Otherwise Linux distributions wouldn’t even have OpenSSH in base install images.
What? GPL does not restrict freedom, it ensures its continued existence.
Read above please. You cannot import GPL code into BSD licensed code without restricting the code distribution. In the other direction, you can do it and just add a notice about the license. It does not add restrictions to the distribution. Otherwise Linux distributions wouldn’t even have OpenSSH in base install images.