I really hope YoYo pays attention not just to where local GM clubs exist, but also where the local GM clubs don't exist.
I live in Toronto, Canada, and I have never seen a single dedicated GM club where I live. In contrast, there are several active Unity and Unreal meetups, and many more generalist game development meetups.
On a historical note, I used to be part of a local game development networking group called Hand Eye Society. In late 2011, they started an initiative teaching women and minorities how to program games with easy-to-use visual tools. My schedule didn't allow me to help in person, but I offered to help prepare GM materials for any lead instructors teaching it. In the end, there weren't any others and I didn't get the gig. And mind you, Toronto was a city over 2 million strong by then.
I did get some time in later years and offered to take the lead on GM, but by then GMS 1.x is already mainstream and the ship has already sailed. As time went by, GM became more and more distant as a choice, and not once in those later years did GM even come close to making the cut. GM's inability to run on Macs until GMS 2, community and support marginalization of drag-and-drop, a relatively high investment at the outset (compared to free and cheaper alternatives), and an increasing price tag for post-novice development all contributed to this result.
With next to zero D&D support to compete with other D&D tools and poor text rendering support in CJK/CTL text to attract international audiences, I think YoYo should take a cold, hard look at why it is only somewhat effective at retaining existing users, but not all that effective at attracting new ones.