This 2017 study says that herbicide use has been increasing overall, also on non-GMO crops such as wheat and rice. And that the increase rate in GMO crops (corn, soy, cotton) is no faster than in non-GMO crops.
http://weedcontrolfreaks.com/2017/04/gmos-and-herbicides-its...
Apparently the answer is not settled on that yet.
http://advances.sciencemag.org/content/2/8/e1600850
https://www.npr.org/sections/thesalt/2016/09/01/492091546/ho...
https://www.forbes.com/sites/bethhoffman/2013/07/02/gmo-crop...