GB WhatsApp was a modified version of the popular messaging app WhatsApp. It was developed by a third party and offered additional features and customization options that were not available in the official WhatsApp app. Some of the features included in GB WhatsApp were:

1. Customization: GB WhatsApp allowed users to customize the appearance of the app, including themes, fonts, and colors.

2. Privacy Features: It provides enhanced privacy features, such as the ability to hide your online status, blue ticks, and even the typing indicator.

3. Message Scheduling: Users could schedule messages to be sent at a specific time and date.

4. DND Mode: GB WhatsApp had a "Do Not Disturb" mode that allowed users to mute notifications for specific chats or the entire app.