UniPay is payment gateway software
The answer to this question is yes and no. While in the general sense of the word, UniPay gateway definitely fits the definition of a credit card processing software package (since you can process credit cards through UniPay and use UniPay as either a payment gateway or a virtual terminal), the term “credit card processing software” is often used to designate a desktop application that you install on your computer to process credit cards. In this sense, UniPay is not “credit card processing software”, as it is an entirely web-based solution and has no components that could be installed on a desktop. The term “payment gateway software” would be a lot more appropriate to define UniPay gateway.