Red gum: as my esteemed colleague Mr. Noahh has already noted.
"Fruitwood" was most likely a term the marketing and sales team came up with. Can you imagine advertising your gun as "the gun with the finest gum wood stock in the industry"? No way. In fact I suppose they went out of their way
not to call it gum wood.
For many many years red gum was the most harvested hard wood annually in the US, in terms of board footage. Don't know if that is still the case, but I suppose simple internet search would answer that question.
Edit:
http://www.slma.org/pdf/Hardwood-Handbook.pdf see page 16
https://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/liquidambar/styraciflua.htm Note: Sweatgum = Red gum
