GB WhatsApp is a modified version of the original WhatsApp. It offers additional features and customization options that aren't available in the regular version. Some of its features include:

1. Customization: You can change themes, fonts, and colors to make your WhatsApp look different from the original app.
2. Multiple Accounts: You can use two WhatsApp accounts on the same device.
3. Privacy Settings: GB WhatsApp lets you hide your last seen, blue ticks (read receipts), and typing status from others.
4. Message Scheduling: You can schedule messages to be sent at a specific time.
5. Increased File Sharing Limit: It allows you to send larger files, videos, and documents compared to the original WhatsApp.
6. Anti-Ban: GB WhatsApp has a feature that helps avoid getting banned for using the modified app.
7. Enhanced Media Features: You can send images in better quality and use more emojis.

To use Gbwhats online, you need to download the APK file from an external source, as it's not available on official app stores like Google Play. However, keep in mind that using modified apps can carry security risks and may violate WhatsApp's terms of service, which could lead to being temporarily or permanently banned from the platform.