No one is going to get a biopsy after testing positive once. A positive test would mean you go to a doctor for a proper mammogram, THEN maybe a biopsy.

It’s definitely pronounced without the g sound.

https://www.merriam-webster.com/dictionary/gnu

Alma and Rocky depend on the publicly available source code for RHEL. Red Hat decided to close source except to paying customers. https://www.theregister.com/2023/06/23/red_hat_centos_move/