Hi and welcome!
It must be very exciting to see your DD has the opportunity to take part in a gifted program. You are probably best to make sure she is well rested, fed on good quality food and feeling relaxed about the interview process. The most important part I would think is tell her to be herself. By trying to find a way in - regardless of the potential payoff of better schools etc, you run the very real risk of your daughter being placed in a environment that is too stressful for her.
Of course if she belongs there, and she has strong results and the interviewers find she is motivated (intrinsically) then I'm sure she'll be find.
You probably won't find too much support here for expansion of GT programs to increase diversity as most of us a trying to reduce GT classes so they can focus on the HG plus students rather than the top 5% or so that regular GT programs cater to.
Having said that - you know your daughter, if you believe she is gifted, if she is not achieving because of her giftedness not being catered for, then go for gold. Have a good look around the Davidson website and read up about identification and advocating see what you think. Good luck!!!
