It would take a team of Jaegers attacking quickly (to take advantage of his slow movement) and also from a distance, paired with the might of the world’s army, to stand a chance.
We’ve seen Pacific Rim’s Jaegers in action and know that they can struggle to take on the kaiju of their own universe.
They are drastically undersized compared to Godzilla when it comes to weight, so one swipe could foreseeably obliterate even the biggest and most expensive Jaeger with ease.
Even then, it seems the most that could be done in battling the current Godzilla is to piss him off enough so he just leave, but he’s too dense just to be killed through these means.