Ah duh. . . you are correct. The GSP column shows 0. Sorry. . . still learning my way around the game. So I guess the only type of cost is an annual wealth cost.
Question on STO unit re-supply. I've created a Gauss Cannon battery for planetary defense. Does that type of STO unit require GSP re-supply using logistics units? If so, do the standard ground unit re-supply rules apply in that it can fire for 10 rounds utilizing its organic supply and then would require some type of re-supply from a higher echelon? Or does GSP re-supply only apply to non-STO units?