I'm assuming you're talking about the GB button in the Town Hall that's labelled "Current Contributions to Great Buildings?" As such, it shows your current contribution to great buildings. To see which prints you have in your inventory, you have to look in your inventory. While there, you can see the goods/building info. I'm not sure how else you would organize it. If you do have a good suggestion for how to do it, I suggest making a proposal, following the format pinned in that section of the forum.