It's a debit card offered by Go Bank. Just like a checking account. It's not a credit card, it says so on the card itself.
The only thing that comes close to credit is the fact that you can charge up to $100 in overdraft and they'll cover the transaction, then they would deduct your overage from your future earnings.
Treat it like your regular checking account and you should have no issues. Also, whatever money you put into the account is FDIC insured.