This is an issue that cuts across all boundaries. GT kids exist in all economic and racial groups and many fall through the cracks - and most - at the lower end of the economic tier - probably never get identified or helped at all.
IMHO, early ID and tracking and parental education is the best place to start. I like the idea of educating pediatricians and their staff and then providing collateral for the parents and caregivers. Peds screen for slow development, but the opposite should be true as well.
( I've seen our Pediatrician's reaction to Jr - she immediately saw that he was very advanced and said so, but did not make any other comment as to his behaviors and exected future trajectory.)
If parents are informed as to the reasons for their kids' behaviors and then given alternatives and resources to help, that would go a long way to getting the kids on a firm footing, but at a low cost.
The simplest thing might be to form a foundation similar to the March of Dimes that supports research, promotes awareness, and advocates as needed. For less privileged people, it can help with early education materials as well.