As I remember it, something to remember is that gravity does not usually go around in particles.

When you get light you get a stream of photons - OK they are both a wave and a particle, but they behave as particles which is why they are both.

With Gravity (and magnetism) what you get is a field (I have no idea how this works) but the particles are not there. To actually get a gravity particle (is that the Higgs boson?) takes a huge amount of energy and luck.

It's a bit simpler with electromagnetism - you can have an electric or a magnetic field and you can also have a flow of electricity (electrons), but they are not actually the same thing, or rather they are different manifestations of the same thing...

No, I don't understand this one at all.