Corinnguard
Hero
I believe so. I was able to find the 5e stats for the Gnolls in the Midgard Heroes Handbook on 5esrd.com. Gnoll – 5th Edition SRD There are two Gnoll subraces mentioned in this link-Civilized and Savage.I am toying with a gnoll replacement (more along the lines of Runequest's broo, which operate in the same thematic space) and making it a playable ancestry in Shadowdark, although it would be one of the "uncorrupted" tribes, rather than evil demon-worshipping ones.
Doesn't Kobold Press have gnolls available as a PC race in their Southlands setting?