This cute little incorrect meme absolutely destroys the meaning of gnostic and agnostic as used by everyone else in the universe except atheists. This is what happens when you try to appropriate Greek terms that you think are neat, while paying no respect to their historical meaning.
1 Relating to knowledge, especially esoteric mystical knowledge.
1.1 Relating to Gnosticism.
An adherent of Gnosticism.
[mass noun] A prominent heretical movement of the 2nd-century Christian Church, partly of pre-Christian origin. Gnostic doctrine taught that the world was created and ruled by a lesser divinity, the demiurge, and that Christ was an emissary of the remote supreme divine being, esoteric knowledge (gnosis) of whom enabled the redemption of the human spirit.
A person who believes that nothing is known or can be known of the existence or nature of God.
1 Relating to agnostics or agnosticism.