Poll
63%
38%
Since Vastor only has Force Push, GG probably takes him on a saber match, but counting on the facto the setting of this fight is the jungles of Haruun Kal, and knowing Vastor knows this place from head to toe, Vastor will take advantage of this place in the fight, and it may be enough to take down GG. However, if the setting was elsewhere, GG would probably win this match.
Vastor wins - he has his Vibor Shiv's, the OP was only stating that he couldn't use any Force Powers except Push, it didn't mean that the only thing he could use was Push and no weapons. And Mace said that he couldn't beat Kar on his best day, but he beat Grievous. There is no doubt that Kar > Grievous.