I read about a Native American Flute tuned to the Arabian Scale in the key of G. I know the NAF is tuned to a pentatonic scale but am not familiar with the Arabian Scale. Does it have 5 notes? 7 notes?
I would assume that the scale you are referring to would be:
G Ab B C D Eb F# G
It is also called Gypsy Major, and in music theory, it is often called double harmonic major.
Enjoy playing with it - it's a really fun sound!