Does anyone if is it possible to combine the gravity warp and the velocity of an object to simulate an orbit trajectory?

Hey, that's a good question. Theoretically if your Gravity SW is spherical and attenuated and moves in the scene, any particles pulled towards it should exhibit some form of orbit trajectory. But if you want it to actually capture the particles are retain its tangent velocity, then you should be looking at a Cylindrical Gravity well (www.max3dstuff.com).