Art 2 says that the convention applies whenever and whereever two sovereign armies clash, and in 1967 two sovereign armies did, indeed, clash in the West Bank. Article 6 says GCIV stops applying when the two armies stop fighting, **except** where one army remains in occupation of territory. Art 6 does **not** say that the occupied territory has to be the sovereign territory of the other belligerent, it merely says that YOUR army has to be an occupier. The fighting stopped 43 years ago, and the IDF is stll the occupying power, ergo, GCIV has remained applicable in the West Bank for all of those 43 years.
First refugees travelling on Hungarian bus arrive at Austrian border (Reuters)
from the article: Arab states preparing UN resolution against Israeli settlements