Others have covered the main considerations above: age wrt test options and accuracy, and value wrt access and instructional planning.
I agree that, educationally, you are unlikely to obtain much incremental benefit from testing at this time. Socially, DYS or other organizations may connect your family to intellectual peers, but it probably will not address the kind of friendship needs that a five-year-old generally requires, as even very bright young children need more than friendships that are physically distant and sporadic. I would encourage you to pursue resources in your area, and perhaps look toward national organizations in the future.
