Good evening, I hope all is well. GRC is a broad topic, as it encompasses Governance, Risk & Compliance activities across the enterprise. It is discussed in any shows (at some level) that address Risk as a topic as noted below:
Having said that, I agree with you that the topic is often covered in a "scatter-shot" manner and is disjointed and hard to follow. The best certification based approach and material would be for CRISC & CGEIT (ISACA), but we currently do not have content in the library for these. You could look at the following NIST documents for a good primer on risk overall and the ISACA COBIT framework for the Governance piece.
NIST Risk Management Framework: https://csrc.nist.gov/Projects/Risk-Management/Risk-Management-Framework-(RMF)-Overview
ISACA COBIT: http://www.isaca.org/COBIT/Pages/default.aspx
Once you have had a chance to digest the info, please feel free to reach out as needed with any questions that you have.
Good luck !!!