^^
Says who? Goku in SSJ3 in FR can shake now only Hell, but Heaven, and everywhere else all the way past Grand Kai's Planet. Heaven is considered as large as the Living World, which is stated to be Infinite. The area around it must ALSO be a higher infinity to house it. So if Goku can "Shake" those higher infinities, he can destroy a lower one. According to statements about the size of the Realm of the Kai being 1/10th the size of the macrocosm, then this means that the macrocosm contains 10 Infinities. If Goku in SSJ3 can destroy ONE infinity, then a 10X multiplier is all that is required to destroy 10 of them (BoG Goku destroys 10 Infinities) So unless Base Gogeta is so weak that he's not 10X stronger than SSJ3 Goku (You'd be saying Fusion's multiplier is less than 4,000X), then yes, Gogeta in Base would be able to smoke SSG Goku.