Well they have an SRD (or PRD) so as long as it would follow the same as LEW's OGL only policy then that
should work.
Pathfinder Roleplaying Game Reference Document
The Pathfinder Roleplaying Game is released under the Open Game License, meaning the core rules that drive the Pathfinder RPG system are available to anyone to use for free under the terms of the OGL. This compendium of rules, charts, and tables contains all of the open rules in the system, and is provided for the use of the community of gamers and publishers working with the system.