I'm not necessarily aware of the specific gnostic readings you're thinking of at the end there but kinda related to that - I'm not sure if there is a difference between the gnostic sense of knowledge (gnosis) and narrative relevance, considering that the study of gnosis helps you escape from the material reality you are homestuck in. (As we know, in Homestuck, narratives themselves are the 'material reality'.) Is canon not 'true knowledge' (gnosis)? Is non-canon not 'false knowledge', or 'irrelevant knowledge'?
If Vriska is someone who goes out of her way to create her own demiurge just so she can be the one to kill it, is she not a fiercely devoted student of gnosis? A bit fanatical, even?