I'm an EA, not a CPA. When I do bookkeeping for entity clients, I keep the books on the tax basis. Then, when preparing the tax returns, I have NO book-to-tax differences. I can't help you. And, the only things I want to learn about GAAP is when it might be required for a client, when it might come into play when preparing tax returns, if ever.
I do think you need an accounting forum. If enough accountants are here and keep GAAP books for their clients, perhaps you could request a separate forum here. But, in the meantime, do look for a GAAP forum under CPA-specific sites, maybe AICPA.