Coincidentally I've just brought up something similar in the private forum.
Trademark infringement is avoided by calling the course something else. But architecture, including course architecture, is inherently protected by copyright. Old courses that predate copyright or now have copyright expired and public courses I suggest would be fine, but the others? Architectural copyright gives the architect an exclusive right to produce the design - whether a 3d version for game is violating that would be for the courts to decide. From experience I can tell you digital copyright is a mess, the laws years behind and no-one has any firm answers.
We would probably be ignored or get away with a simple C&D because of the unpredictability of court with no guarantee we have enough money to go for. But even poor companies typically have liability insurance to target.
Edit: I have since learned that because the main purpose of a golf course is utilitarian rather than just being a work of art, it is ineligible for copyright protection.