I frequently see posts asking if WGU grads can get into other schools for higher degrees due to the competency-based model and its 3.0 GPA. Here is a partial list.
Furthermore, MANY big name universities are now rolling out competency based degrees of their own- among them Purdue. (Fun fact: Purdue's President, Mitch Daniels, was Governor of Indiana when WGU Indiana was chartered and his experience with WGU and the quality of its grads is partially driving this effort.)
PARTIAL list of schools accepting WGU grads for higher degrees (including doctorate)