Yes, go to this link https://project-gc.com/Statistics/ProfileStats and click on Settings. Settings is just under the paragraphs in the upper left side. After clicking on Settings, scroll down until you see the option
Add this list to my Hidden tab
Then add the GC codes (be sure to click on the button Add and then Save.
You can also do it from a bookmark list or even a profile name. Make sure you Save it before exiting the page.