GT downplay is really off the charts here. Less than universal SSJ4 Gogeta? Really? Even though he curb-stomped Omega Shenron, who directly stated that he would destroy the universe, even extending to the Kaioshin realm, a different time-space?

Most if not all of these feats & statements show us GT characters above Multi-Galaxy EASILY.

GT Goku destroying a dimension in base

GT Goku stating Rildo's power in base form alone exceeds Majin Buu's.

And regardless, Goku still curb-stomps him.

Goku casually humiliating two Baby-possessed Super Saiyans (Gohan and Goten) in his base form. Earlier, Baby possessed SSJ Gohan stomped base Vegeta with ease.

Baby Vegeta being above SSJ3 Goku.

GT Goku stating Baby in Strongest Form 1 is the strongest ki he's ever felt, utterly annihilating any argument that Dragon Ball Z top tiers are more powerful. This should also put him in Multi-Universal simply for being above Buuhan and Super Vegito.

The shockwaves from Baby in Strongest Form 2 can affect Kibito Kai when he's using Kai Kai, a technique that happens instantly.

Baby Vegeta in Strongest Form 2 making SSJ3 Goku, who received a Zenkai boost and his stamina issues eliminated from gaining a tail, look like a joke.

Super Saiyan 4 Goku tanking Strongest Form 2 Baby's attacks and humiliating him.

There's so much to count I'll accidentally make a mini-respect thread, so I'll just get to SSJ4 Gogeta already and wrap it up.

Omega Shenron's mere presence was going to destroy the entire universe. Not an attack, not with his punches, no. His mere presence alone was going to destroy the universe.

SSJ4 Gogeta kicks away and nullifies the Omega Shenron's strongest attack that would've likely destroyed the entire universe.