Once you accept that Space is a fake lie made by Jews and Freemasons, and the world is a closed system, you no longer need "gravity" to explain things. Density/Buoyancy/Electromagnetism are all you need.
"Antigrav" already exists. It's called a submarine/balloon. There is a reason Nazis were big on both blimps and Antigrav.
When will we reclaim our heavens from the spacejew?