Gog makes the offline installers not Larian and 3 days is nothing... its a big change
Maybe (or they gave Larian the means for it?), but even then GOG can only make them if the devs deliver the necessary patch files, and we don't know if that's the case. Thus, an official statement about that here or on the GOG forum would be nice and professional.
3 days are long if you can't play with your friends on Steam anymore because they already got the update. This busted our weekly gaming session yesterday. And since there were tools to create patches autmatically by comparing the differences between two versions decades ago, I take the liberty to presume that the extent of the change shouldn't matter that much. But again, we don't know, so I'd be happy to be better informed and eventually corrected by an official.
edit Windows version 4.11.5849914 is now live for off line install
Yes, it already was when I asked about the patch installer, and that is still missing as I just checked. Instead of downloading and re-installing the whole game, we'd rather have much smaller patch installers to
update it in much shorter time. (Actually, another of us needs it much more, because she has a slow internet connection and very limited disk space.) Even GOG Galaxy began to download over 100 GB when we tried to update BG3 this way yesterday, while many other GOG games (also big ones) just get quickly patched by it. So again, I dare to suspect that it's
not a GOG issue (alone).
Disclaimer: I don't blame anyone (yet), we just would like to hear some estimate to know if we can expect a patch until our next session next sunday.