GB WhatsApp is a third-party application that builds upon the original WhatsApp, providing users with an array of additional features not available in the official app. It allows for greater customization, privacy options, and functionality, which has made it particularly popular among tech-savvy individuals and those looking for more flexibility in their messaging app. However, it's essential to note that GB WhatsApp is not an official product and is not endorsed by WhatsApp Inc., which brings about certain risks and considerations regarding its use.