I agree with monkeyfinger that their secondary traits are counterintuitive, but I wouldn't call them trash. What I think they ought to do is encourage different uses of living units for the Luchuirp.
Arcane fits GG's backstory and the extra magic power is great for him, especially getting those adepts up to stoneskin.
Defender isn't wasted on them because the golems miss out; their mounted line benefit greatly from the extra strength and withdrawal, and they make up for the golems slowness. I think Defender would fir BB better than GG, since he's probably very bitter after his time with Perp and would be defensive.
Guild of Hammers and Gift of Nan. do cancel out Industrious, but it's still powerful until then. Financial is powerful enough as an empire-boosting trait and Industrious just adds to that, making the choice between GG and BB as they currently are pretty lopsided.
They should each have Financial as the civ's trait, in a way, but then they should differ with a military boosting trait: Arcane for GG and Defender for BB.
They should have the boost to living units because while golems are very powerful at what they're good at, their lack of mobility makes golem-heavy civ vulnerable to mounted pillagers ruining production. Arcane and Defender help with that. The Fireballs are the only thing that borders on overpowered.
/2