Moz support suggests that the community may be able to answer this question, and I would appreciate the help. I own a coworking space that offers virtual office services. Based on my reading of Google's guidelines, A virtual office doesn't qualify for a GMB listing. However, multiple virtual office sites are offering GMB PIN codes if the member signs up for 6 months of service. The claim is that Google will see the address as "stable" after 6 months. The only possible reference I can find for this is 6 months for SEO results. Google expressly states, "virtual offices are not eligible for a business profile." Thanks for any feedback