Would Super Saiyan 4 have been impressive to Beerus, Golden Frieza, Hit, Goku Black, and Zamasu?

[Saiyan007]

There is a brief conversation between Beerus and SSJ4 Gogeta in Xenoverse.

Beerus: "Hohoho! That's an amazing power! Not bad at all!"
Gogeta: "Maybe I can win against Lord Beerus now."

Beerus is impressed but from the sound of Gogeta's statement that only "maybe" he can win, it seems that Beerus is still stronger and likely isn't using his full power even in this future. I guess if we want to define it as leaving a positive impression upon God-tier beings then SSJ4 does indeed impress them...however this isn't confirmation that SSJ4 is actually strong in comparison to them.

Using video games of all things as a source is silly I can beat Gogeta by using Pan is that proof Pan is stronger?

[Grimlock]

Using video games of all things as a source is silly I can beat Gogeta by using Pan is that proof Pan is stronger?

And that's the difference, you beat Gogeta using Pan, not the actual "spirit of thing". The dialogues the characters have weren't created by you. They're in the game, the dialogues come from the game itself...

[Hugo Boss]

Yes. They would say, "Wow! That is very impressive." And then fight Goku in a manner completely dependent on scriptwriter, storyboard artist, animator and director that does not indicate one way or the other whether Super Saiyan 4 is stronger than god forms.

Pretty much this. It depends on the product's final take. There is no way to tell right now how they compare in terms of power.

[theherodjl]

Using video games of all things as a source is silly I can beat Gogeta by using Pan is that proof Pan is stronger?

Except in-game dialogue isn't the result of a controlled match but interaction before it takes place, and who determined that using a source from the video games is silly or worthless? They do provide some information that the anime doesn't and in this case, offers a take on where exactly GT characters stand against new characters & transformations.