As a side note, I personally do not consider her PG. I'd guess maybe 3 SD out.
As a side note on your side note, PG means a lot of different things to different people. On a modern IQ test such as the WISCIV or SB-5 3SD out means an IQ of 145, and that is exactly the cut-off that the Davidson Institute, with which this forum is associated, uses to define PG (the population they aim to serve). Some people use a higher cut-off, but given how unreliable the tests are at and above this kind of level, theirs makes some kind of sense. Lots more about this at Hoagies. But in that sense the "PG" label might well fit your DD. (Sorry ;-)