Board Thread:Fanmade/@comment-28702329-20190303093438/@comment-40261920-20200526200241

GER can still revert any of Valentine's attacks, including his attempts to summon other Giornos, which leaves Valentine with no options other than trying a direct attack, which means he needs to leave Love Train, allowing Giorno to destroy him. Checkmate.

If Tusk Act 4's shots can be reversed by another shot, and will eventually stop chasing its targets like we see in High Voltage, then it is clearly able to be negated. GER can reset any action, including the action of firing the "infinite" rotation.