Track down Giidib to his last known location, on the beach in southern Antonica (Coldwind Coastline, this is the beach where Town the Lazy spawns). ( -630, -34, 800 ) /waypoint -630, -34, 800
tree branches ( -885, -10, 408 ) /waypoint -885, -10, 408 (remember to look up to inspect the foliage)
the rock in the beaver pond in Archer's Woods ( -764, -7, 456 ) /waypoint -764, -7, 456 which will spawn Giidib.
Right-click Giidib and select "Lead him to the nearest guard tower." Run to the guard tower at ( -388, 4, 285 ) /waypoint -388, 4, 285. Giidib should drop dead.
When Giidib dies, return to Frup Groaak in Castleview Hamlet to give him the bad news and receive your reward.