What a news, probably UI Blanco Goku could've done that faster, and he is Low 2-C
UI Goku has some evidence of being stronger than Beerus and has the abilities of Ultra Instinct to aid him further. Broly has evidence of being stronger than Beerus.
UI Goku and Broly, based on what we know, have similar AP but Goku has his UI abilities, so he would likely beat Broly. At the same time, Jiren w/o UI could tag, hurt and pressure UI Goku, meaning UI has its limits.
So if Gogeta can curbstomp Broly casually, when Broly should have similar power to UI Goku then, Gogeta would very likely crush UI Goku.
Again, I'm not claiming Gogeta is 2-C. I am arguing that, due to stomping a Beerus-level opponent, Gogeta should be likely 2-C. Considering anyone 2x Beerus should be treated as 2-C, based on the arguments made here. Please refer back to the definition of 'Likely' to get an idea of what claiming such a thing would actually mean, regarding how Gogeta is scaled.