According with Wikipedia:
Dating methods have shown that G. blacki
existed for at least a million years, going extinct about 100,000 years ago
after having been contemporary with (anatomically) modern humans (Homo
sapiens) for tens of thousands of years, and co-existing with H. erectus
before the appearance of H. sapiens.
Interesting, about 100,000 years ago is also the
date when the large Wanhsien tigers developed they largest form and also when
they began they spread to the south and invaded the Sunda shelf.
So, it is possible that Pleistocene tigers of
China do preyed on Gigantophitecus,
although for its large size, I think that tigers hunted them only at the end of
the existence of the great ape, just when tigers were enough larger to kill
It is curious that when large tigers existed,
the giant primates disappeared. Check that also the large Meganthropus of Java disappeared. I am not saying that tigers
killed all the large apes, of course not. However, is possible that some
climate change affected the habitat of these two large animals, but at the end,
tigers found it useful and even expanded them dominions, while the giant apes
could not adapt to this new habitats.