First, download the GameStop Wallet from wallet.gamestop.com. It's available for Google Chrome and the Brave web browser.
Once you install it, you'll find it in the Extensions Tray of your web browser. You may want to click the 'pin' icon to keep it active.
The GameStop Wallet is easy to use. Simply click "Create Wallet", and then write down your Secret Phrase.
This is very important - your Secret Phrase is the only way to recover your wallet. GameStop does not have access to reset access to your wallet.
Once you have written down your Secret Phrase (I can't stress this enough), then you're ready to start using your GameStop Browser Wallet!
Your next step:
If you already have a wallet on another app, you may want to migrate it rather than creating a new wallet. Here's a guide on how to migrate a MetaMask wallet.