Ssj4 gogeta toyed with the extremely, powerful villain omega shenron! So gogeta has two forms which can be considered his ultimate Gogeta easily but whenever gogeta is in the mix, his design is always the best, so it was a foregone conclusion yes
Gogeta Blue Render [Dokkan Battle Render] by woodlandbuckle on DeviantArt
Gogeta wears ssgss the best, too.
Gogeta would likely be several times more powerful than him
At the very most, gogeta ssj4 could tangle with the likes of goku super saiyan god red but he get's easily destroyed by the super. Ssj broly and ssj gogeta fire blasts at each other, the resulting clash breaks reality and sends them to dimension of strange swirling lights That's basically the simplest of explanations of. Ssb gogeta is the same way with mui goku, considering the multipliers of power gogeta should be in a different league from mui goku.
Ss4 gogeta (dragon ball gt) cabba (dragon ball super / tournament of power) Gogeta wins, but mostly because goku can't stay in mui for too long, gogeta and goku are actually very relative to each.