I presume, as have Lillie and seemingly BrightEye, that the 'Book of Thoth' SerpentaAzothi refers to is Crowley's
book by that title, rather than using Etteilla's much earlier
deck by that title, or the still earlier essay by C. de Gebelin describing Tarot in general as the 'Book of Thoth', and providing guidelines as to symbolic meaning.
I must admit that when I saw the title of the thread, my first thought was
not Crowley's book, but rather de Gebelin's essay and, perhaps with even more importance, the ensuing essay by C. d. M*** within the same book.
On de Gebelin, see the
entry in Tarotpedia here.
The C. de Mellet's essay even begins his first section with the title 'Book of Thoth', and provides within the overall essay clear suggestions for divinatory interpretion of Tarot.
Could these be usefully applied to a deck such as the Cicero's GD deck? I would think that the text has much to offer in assisting to understand Tarot in general, especially in the weavings of views that have developed over the past 200 years.