Watching Harry Giles in Summer League, I can see why Vlade may have slipped and said Giles could play some Small Forward.
His handles is pretty good and his passing and court vision is better than a lot of small forwards in the league. He also has enough lateral quickness to guard most small forwards.
If he can sharpen up his outside and 3 point shooting, he may be able to play the 3, 4, and 5 in time.
If the Kings go big, they would be a hard matchup and difficult to handle:
PF: Bagley
SF: Giles
C: WCS
SG: Bogdan
PG: Fox