Paying by PayPal
If you have a PayPal account, then you can pay for your orders at Gandi if the order's total is over the minimum amount of $10 (€10, or £8).
If you choose this method, you will be forwarded to the secure PayPal website where you will be asked to enter your PayPal connection information (and not Gandi's).
If you do not have a PayPal account, you can create one directly from that page, and even pay for your order by credit card using the PayPal interface.