They used the model in Spain a few months ago according to this article.
The contagion rate of the Covid-19 will decrease in "seven or ten days", according to mathematical models | Spain's News
Yeah, and it seems to have been correct everywhere. I don’t get an exact date on that article, but it’s in early March somewhere and Spain’s numbers started to drop in late March.
Of course, if you believe that you have 1,000 cases somewhere, and you in fact have 100,000 cases, it will of course start to drop later which I think has been the case with a few early Gompertz models.