It has nothing to do with GCC, nothing with code quality, nothing with your contributions to the project, you don't say that in code, in code comments, on gcc mailing lists, anywhere gcc related.
But, because of the CoC ( https://gcc.gnu.org/conduct.html ), which says:
> This code of conduct applies to all spaces managed by the GCC project. This includes IRC, the mailing lists, the issue tracker, events, and any other forums created by the project team which the community uses for communication.
(this ^ part is ok, you should behave like a professional when dealing with stuff like this; general (non-gcc-related) politics or whatever non-gcc-related doesn't belong in GCC mailing lists)
> In addition, violations of this code outside these spaces may affect a person's ability to participate within them.
But this part changes everything, and makes CoCs like this one a bad thing.
Been on a (eg.) Trump rally in your free time, unrelated to anything GCC? Some overzelaous CoC enforcer bans you, and it's "totally fine", because the CoC allows this.