The rumor is these Gibson amps are good. Never played one, so I can only offer what I have heard many times.
For me, if I had my druthers I would always use Ampegs. And for many gigs, I had my druthers. But I also have played many great bass rigs, some old some new. A few that I liked: Peavey MkIII, SWR, Eden, Guild/Hartke, Trace Elliot, acoustic. Fenders typically take work and must have lots of headroom, hence most old Bassman amps are totally worthless for bass. Showmans or 135s have enough power and can be manipulated enough. That old Gibson thing that Jerry Lee Lewis' guy used in the old movie was fun for its time, but I wouldn't pay any for it.
I had an old Alamo bass amp that sounded like crap. That was a least fave.