Just wanted to pop in w/ some resources I've found as I've started this journey. Besides the davidson website, of course, there is also Hoagies, SENG, NAGC. It's likely there is a state version of NAGC for you too, so worth checking into.
The biggest reason we wanted to know is b/c the further right on the bell curve you go, the more "quirks" that can pop up. Many of DD5's quirks led us to assume ADHD until we got her WPPSI results. May still have ADHD but we've been told to "treat as if" 2E but not test further for a couple years b/c it may be this is just the "highly gifted brain wiring." It's a lot to absorb.
Best of luck!