Are you sure that you've worked your way through the actual physics here? I see a couple of minor problems.
Electromagnetic fields cause the reversal of gravitation?
Moving a magnet near the surface at Mach 2.7 (920 m/s) east to west against the west to east rotation of the earth is going to twist spacetime and introduce a repulsive force?
Electromagnetic fields and gravitational fields aren't the same thing and their relative strengths are vastly different. Different strength as in the electromagnetic force is a thousand, billion, billion, billion, billion (10^39) times stronger than gravitation.
What you propose is already present. You do know that, yes? At the equator earth's rotational velocity is ~920 m/s west to east. We are orbiting the sun east to west (in relation to the earth's rotation) at 385,200,000,000 m/s as we plow through the sun's magnetic field that extends far past Pluto. Have we observed a general twisting of spacetime or time travel of the entire planet to the future?
As I said to another poster last week, I'm not making fun of you. I'm asking questions that are intended to cause you to look more closely at your idea. Does it conform or conflict with the known laws of physics? If it conflicts, where does it conflict and why? If it conflicts have you attempted to fix it?
Of course there's one really big question, assuming the idea isn't just picked from air and is actually viable: Have you asked the permission of the 8 billion occupants of Earth if they want to fly away with you?
All that being said, gravitoelectromagnetism is real. The electromagnetic and gravitational fields do interact. That's a place for you to start. It's not simple and it begins with Maxwell's equations and then on to Einstein's tensor equations in general relativity.
