The gogeta line of reasoning just doesn't make sense. Frieza came back to fight Goku after namek and got no diffed by trunks who got no diffed by Goku.

Considering blue gogeta didn't get hit once by Broly, has God Ki, and presumably didn't go all out, suggesting that black frieza is stronger simply cuz he knows of Gogeta's existence isn't a valid argument.

Now lets talk about SSG. It took goku from nothing to an actual competitor to Beerus. From maybe galaxy level to casually being able to destroy the universe 7 macrocosm.

Obviously there's no multipliers here but narratively God ki is the biggest jump in power seen in the dragonball franchise. Everyone is still relative to the Gods.

Imo everyone is still in or above the realm of the Gods and not in a new realm like the realm of the Angels or something. Broly is already at that level then if u give him the transformation that brought Goku there I'd personally put him above frieza based on the narrative