Gufw is described as 'Easy, intuitive way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports port(s), and many others! Gufw is powered by Uncomplicated Firewall (ufw)' and is a popular Firewall in the file sharing category. There are more than 25 alternatives to Gufw for a variety of platforms, including Windows, Linux, Android, iPhone and Mac apps. The best Gufw alternative is Portmaster, which is both free and Open Source. Other great apps like Gufw are simplewall, Fort Firewall, TinyWall and NetLimiter.
one is linux exclusive and the other windows exclusive, you can not use one instead of the other