Knowing that all this is only consciousness, there remains nothing further for the wise man to know or to attain
Names consciousness itself as the final destination of the search, after which the Gita insists there is literally nothing left on the spiritual to-do list.
Chapter 11 arrives at a conclusion that functions almost as a full stop for the whole text: once "all this" — the world, the body, the sense of self — is recognized as consciousness alone, the search that produced every other spiritual practice has nowhere further to go. This is a deliberately anti-progressive claim; most contemplative traditions describe stages, and even much of Vedanta describes graded practice, but the Ashtavakra Gita treats this recognition as instantaneous and total rather than incremental. The wise man referenced here is not someone who has completed a program but someone for whom the question "what is there left to know" has simply stopped generating an answer, because the seeking and the sought turn out to be the same thing.
Ashtavakra Gita