It seems that gravitational waves are believed to occur only between masses moving relative to each other. Masses at rest would still feel mutual gravitational attraction, so gravitons in a particle, rather than a wave configuration are presumably involved.
Since gravitons are assumed to be massless, they probably react very little with matter. This would appear to make any kind of conventional manipulation of them for the purpose of controlling gravity very, very difficult.
The graviton is generally considered to have no charge, so it would seem to have no antiparticle, which might otherwise be useful in controlling gravity.
I suspect that any control of gravity must involve the creation of a state similar, in at least some respects, to that which existed when the universe was very young, before the forces of elecrtromagnetism and gravity became distinct from one another. Under such conditions the control of electromagnetism, which we find relatively easy, might also allow the control of gravity.

Michael Tullio has said that the Higgs field only affect leptons . But seeing as we have not found all the Higgs particles yet that may change but Tullio is the man whom understands this stuff . I hope he can gives us a idea about what you are saying with electromagnetism and gravity it's sound plausible but what do I know . If what I have herd about what's happening in Area 51 or more to the point (Dreamland) at Groom Lake then you could be right the UFO's there could be manipulating gravity or the Higgs field but who knows

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Tullio would I be correct in saying all fundamental particles have a antiparticle and therefore that would include gravitons ?

Gravitons are not particles (fermions) but bosons (force carriers). There are fermions which are their own antiparticles and they are called Majorana fermions, from Ettore Majorana who made this hypothesis before disappearing mysteriously in 1938. Enrico Fermi called him a genius in a letter addressed to Mussolini asking to put the police on his search. He was never found.
Tullio

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If Dr. White, and company, at NASA aren't able to produce negative matter, and so a space warp, by disturbing the quantum ground state with an electric charge, the alternative I mentioned above may be worth considering. Experimental fusion reactors and particle colliders are becoming more powerful all the time; more closely reproducing the conditions of the early universe. Feeding a beam of electromagnetic force into one side of the critical area of one of these machines just might cause a directional beam of gravity out the other side, or cause some other gravity anomaly that could be detected.