Hi!

I don't think it's possible to apply a filter here as you think you want to do.

Theory is already integrated progressively within GTs course structure. Basics in Fundamentals 1 & 2, and then streaming in from there pertinent to application.

I totally get the the enthusisam driving a thirst for knowledge, but knowing isn't doing. e.g. Understanding the notation convention on the staff & theory of sheet music isn't reading it fluidly under performance pressure at tempo.

I've taught a over a lifetime myself in a different even more testing dynamic instructional environment, and there is no shortcut. Learning anything complex takes time, and if the information doesn't relate in a pragmatically associative way, it not only interferes with active learning to the point it'll become a slog, but is often not assimilated.

IME&O just trust GT instruction and instructors here to take you to the destination with the course structure block by building block, and enjoy the light bulb moments of the journey. Trust me when I say honestly,that I'm a tech manual reader cover to cover, the kind of guy who does read the manual and turns up fully prepped and then some being used to a 'take no prisoners', 'get it right or you're going home' work environment, but music theory on its own a infinitum will quickly become pretty dry stuff even for someone with the steel discipline.

If you are really set upon wanting to accelerate the process, obtain an overview, or immerse yourself in theory, I'd suggest starting with a book in an easily understood presentation style like "Music Theory for Dummies", or "Guitar All-In-One For Dummies" and reading it in parallel with GTs course.

In the interim, here's something from GT to wet your appetite and perhaps pique interest.