G&L weights can vary a lot depending on the particular pieces of wood used in a given bass. 10+ pounds for a 4-string is not that unusual, and you'll also see plenty in the 8-9 lb range. I like to see more of the 8-9 lb basses than the 10+ pounders, so I almost always request them lightweight.
I think G&L just chooses the body wood a little more carefully when they see that request. They don't guarantee a particular weight range, and they don't do anything extraordinary other than picking a less dense piece of wood from the pile.
I think G&L just chooses the body wood a little more carefully when they see that request. They don't guarantee a particular weight range, and they don't do anything extraordinary other than picking a less dense piece of wood from the pile.