I was going to say exactly what HowlerKarma said. I, too, worry when there is no background in GT, but I've also seen teachers with education in GT who are terrible primarily b/c they've bought into the idea that gifted is about high achievement and is a much broader thing than it is. The teachers who are highly intelligent themselves are the ones who I've found to be the best at teaching and understanding gifted kids (especially HG kids) regardless of their educational background.
OTOH, there is no easy way to figure out how intelligent this teacher is right now without some time to interact. I can tell you that the teachers who've turned out to really not get it did tip their hands pretty quickly. For instance, they were completely unimpressed with 99.9th scores on IQ and otherwise and didn't seem realize that this was uncommon or the degree to which that differed from, say 95th percentile on a group test. They also didn't realize the distinction btwn group tests and IQ tests.
I'd be with the others who suggested sharing resources like the Davidson Educators Guild right away and in a nonthreatening manner. I'd also consider setting up some time early in the year to share your dd's test scores and discuss her needs. The reaction you get in that discussion might give you a clue as to how teachable this teacher is.
