I was mistaken on the fossil evidence for Gigantopithecus. Further research shows that there are a large number of teeth and a few jaw or mandible specimens. The consensus is that the Gigantopithecus was an ape with no homo characteristics and was confined to south-southeast Asia.

The absence of evidence is not evidence of absence, true, however (there is always an "However") a rationalist should not accept any hypothesis without evidence. To date, I am unaware of any empirical evidence to support the existence of Gigantopithecus, living or dead. No fossils, DNA, hair, dropping, etc. Further more nothing in the orthodoxy of hominid linage points to the existence of Gigantopithecus. Yes, we can be surprised from time to time (see Homo floresiensis) but such discoveries are very, very rare and localized. With a creature as supposedly wide spread as Gigantopithecus the evidence should be abundant. If evidence for Gigantopithecus were discovered and verified, it would turn the accepted view of hominid evolution upside down.