Fortunately, we have the nearly universally understood "Linux" instead, and weird specializations like Android can be called something else.
I also happen to think distinctions such as Debian/kFreeBSD (a Debian distribution based around the FreeBSD kernel, as opposed to (just) the regular FreeBSD user-land) are informative.
I'm not sure what one should/would call a Linux distribution with an alternative (non-GNU) libc that relied on a non-GNU compiler chain... Probably "brandname"/Linux or "function"/Linux (eg: Linux Router Project or something)...
I do like that attempt, though. "Well, they used a license that GNU wrote, so GNU should get top billing!" Do you want to talk about how well Apache/Dropwizard and PostgreSQL/PostgreSQL work with Apache/Kotlin on GNU/OpenJDK8?
Citation?
A constantly repeated quote from Linus is precisely: "Making Linux GPL'd was definitely the best thing I ever did." from a 1997 interview according to https://en.wikiquote.org/wiki/Linus_Torvalds
I've never heard Torvalds say anything regretful about using GPL. When I heard him in person just last year, he clarified his dislike of GPLv3 while emphasizing his preference and like of GPLv2.
And anyway, I didn't say anything about "top billing". The fact is, Linux itself is, admittedly, absurd billing for Linus given that he is the leader of the kernel project but is among thousands of people who make it happen. GNU is not a term that credits Richard Stallman. GNU is a community project with a particular political aim. And my point all along was just about some practical way to differentiate Android from the other primary Linux-based systems, and "GNU/Linux" is a way to do that.