steamgifts plus and wishlist

SG+ is a dead script. No one is working on it. It barely has hosting. With the site database switching to the new layout in the not-too-distant future, no one is making changes either to the site code or the script, and no one is going to. The script won't even work at that point.

Right now, it uses the top 25 from your wishlist that SG keeps in the database, as was already pointed out. If you want it to keep track of more, you're going to have to add code yourself that fetches that data directly from Steam's servers. Lotsa luck, because no one else is going to put that kind of work into a dead script that will be deprecated soon.