Okay, so something doesn't seem right, and I can't seem to find the solution after browsing the internet. 

My "game size" in the gamestop app is only .11 MB, and that doesn't seem right. I thought "oh, maybe it's an external installer!" but when I look at the directory, I just have the gamestop logo and uninstall helper. This doesn't make any sense. Tried refreshing, and restarting the gamestop app completely. Any ideas?

EDIT: Nevermind. Literally a minute after posting this, i tried activating the product code with Steam rather than the app, and it worked. (I think, it's still downloading )