Local 5-Pack Spotted
Google is yet to clarify the sighting of a local five-pack.
Local 5-Pack Appears on Google Business Profile
Whether it is an iteration or just a bug remains a mystery, but GBP has displayed local five-pack, expanding from the sets of two and three it typically displays. Local pack results get more engagement than organic results, so it may be user-preferred. There has been no clarification from a Google representative (an example found on Twitter shows a five-stack of personal injury lawyers rather than the traditional two-stack of listings).