Graviton has feats that put him out of GF's weight class. Like literally shaping the world to look like his face, while holding down every hero in the world at the same time.
IMHO, their gravity control powers would basically cancel each other out. But Ge0-Force got a lot more than gravity powers going for him. Imagine him in mountain form, firing blasts of magma at Graviton? Graviton is screwed. Don't believe me?
Check the "Inferno" Fantastic Four tie in, the Human Torch showed that heat attacks work vs Graviton very nicely. He didn't even have to go Nova.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
Ahhh. It happened, but I call PIS. He has force fields powerful enough to stand up to hits from Thor, but he forgets that they can shield him from fire.
*******Oh and look at that message "connection severed" yet MORE proof that the "white light" attacks only work on BLs that have a emotional connection/bond with one of the victims present. In this case Bryon/Terra (just like last time it was Dr. Light/Evil Dr. Light, and Kal-l/Powergirl).
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
He was literally unscathed by Black Lightning's most powerful attack. He stalemated Achilles, who one-shotted Eradicator moments beforehand. He can transmute organics. In his elemental mode he was so powerful that a single punch shifted the entire earth off its axis, and decimated everything in his vicinity.