Yes, and with high impact. Doctors, lawyers, accountants, consultants and other independent professionals are frequently searched by name or specialty in AIs. "Best dermatologist in Belo Horizonte", "labor lawyer in Sao Paulo", "accountant for startups" are common questions that AIs answer with recommendations.
For independent professionals, GEO comes down to: having a website with quality technical content (articles about your specialty), a complete and up-to-date profile in professional directories and licensing boards, an active LinkedIn presence with relevant content and, ideally, mentions in news portals or specialized publications.
The advantage for independent professionals is that the field is still barely contested. Most professionals do not even have a website with content. Whoever starts now gains a significant competitive edge that will be hard to reverse once the market wakes up.