What are your thoughts on MAP testing as an indicator of giftedness?

DD10 scored a 240 on her Reading MAP this fall which puts her in the 99th percentile (maybe even 99.99%) and aligns with 11th grade (she's in 5th).

I know my DD's are gifted, but I've often wondered HOW gifted they are. We haven't needed to do IQ testing at this point (although DD8 may be doing a grade or subject skip so IQ testing may be in our near future for her).

I wonder if DD10 would be considered HG/PG with a score of 240. But not sure if it's an accurate measure or assumption in regards to levels of giftedness.

What are your thoughts?