Board Thread:Fun and Games/@comment-27996636-20170814181056/@comment-28362353-20170815135703

Horus2297 wrote: Goku has already transformed into Super Saiyan Blue multiple times, isn't that just the SSJ version of SSG? If I'm not mistaken, he once said that he learned how to control that power after (or during) his fight with Beerus.

Vegeta achieved that transformation just with traning, now that's a mystery that might require an explanation. But I don't see why Goku would need people to hold hands to transform into SSG. Goku achieved SSB by putting the god power that his body absorbed from the SSG Transformation into his regular SSJ form. SSB is SSJ with the power of SSG.

I don't think its ever stated that Vegeta actually achieved SSG, just that he trained hard and "now he too has the power of a god". He might have though.