Can SSJ2 Gohan (Cell-Games) casually open…

[Fantastische Hure]

a new dimension in the RoSaT the way SSJ3 Gotenks & Super-Boo did?

I say easily. Just waving his arms, no even easier. I don’t think SSJ3 Goku could open a portal up at-all.

 

[DBZAOTA482]

No

 

[GSM123]

He actually did just that. That’s why Goku was right there with him in the beam struggle.

 

[Warmmedown]

He cannot open Gero's Gate.

 

[Aksil]

He cannot open Gero's Gate.

What? This Gohan can obliterate 1/4 of the solar system with a single blow!