You're not the only GNU maintainer who is unsatisfied with Stallman's response. GNU Octave also stands with Guix here, and I think I speak on behalf of at least of a few other co-maintainers. Maybe we should be drafting our own CoC.
As an octave fan, please don't; at least publicly. Do you really need to push this? Do you have actual harassment cases among your developers that such a "punitive" CoC would help to solve?
And yes, we've had our share of unpleasantness.
My objection to the GKCC is that rms is failing to address the actual problems such as the disadvantage of certain groups. I think CoC detractors think that the CoC is going to be used to unfairly punish them in ways they don't understand but, (1) there really isn't much punishing that could be done even if we tried and (2) every community already has an implicit CoC. Writing one only makes it explicit.
Wouldn't you rather know what the rules are instead of having to guess? Right now the rules already exist, but you might not know about them.