I don’t know what any of that means, but if you can do that, please do. I’m questioning your premise that people don’t use it in non-formal writing, even if you exclude social media and limit it only to email.
I’m not questioning that it’s considered informal.
I think that’s a very legitimate question, that indeed would be worth the research, because I’ve always viewed gonna (and wanna, too, BTW, which is a similar phenomenon) as a good illustration of the cognitive “schism” between speech and writing, in that a lot of people who would never write “gonna” often claim that they never say it either, but just about everyone does say it, when they’re speaking naturally. IOW, the convention against written gonna (and written wanna) is so staunch that it causes a kind of blinder toward one’s own speech self-awareness.
We’d have to decide what we mean by “formal” and “non-formal” writing, of course. I consider workplace emails mostly non-formal, but governed by certain conventions nevertheless. If in fact people are using “gonna” in such writing, for example–without “repercussion”–it would be really interesting to know.
See, I made a joke on “all ternative” a few posts up. Then gigi posted a link to a cartoon about terns of reference. And now even guizot himself is doing it!
ETA: Oops, that was in the other thread, about “all right” vs “alright”. Still the point stands.
Jesus, where’d you get that huge bummer you’re carrying around? It’s not often you see a post so self-important and factually incorrect. The English language is not a formal instrument, it has evolved quickly and haphazardly, and there’s no such thing as the right way to use it. Your exclusive perspective went through a state in the colonial era and never got over it.