Last year I had several people asking for a payment gateway that wasn’t PayPal. I set up Square, and not one person has checked out using it in the year I’ve had it.
Having Square set up does have additional costs for me, so in a few days, I’ll be removing this as an option.
I will still have a Square account, however, so if you really want to use it instead, you’ll need to email me and I’ll manually invoice you with Square.