GB WhatsApp is a modified version of the original WhatsApp with extra features that aren't available in the standard app. It allows users to customize their experience, including privacy controls and visual themes.

Key Features of GB WhatsApp:

1. Customization Options: Change themes, colors, fonts, and more to personalize your chat experience.
2. Dual WhatsApp Accounts: You can use GB WhatsApp alongside the official WhatsApp app on the same device.
3. Hide Online Status: You can hide your online status while still seeing others.
4. Anti-Delete Messages: Even if someone deletes a message, you can still see it.
5. Larger File Sharing: Send bigger files like videos (up to 50MB) and images without compression.
6. More Emojis: Access additional emoji options.
7. Status Download: Download other users' statuses directly.
8. Increased Group Name Limit: You can use longer group names than in regular WhatsApp.

How to Install GB WhatsApp:

1. Backup Your Chats: Open your original WhatsApp, go to Settings > Chats > Chat Backup, and back up your chats.
2. Enable Unknown Sources: On your device, go to Settings > Security > Install apps from unknown sources, and enable it.
3. Download GB WhatsApp APK: Search for the GB WhatsApp APK online from a trusted source.
4. Install the APK: Open the downloaded file and follow the instructions to install.
5. Set Up Your Account: Open GB WhatsApp, enter your phone number, and restore your chats from the backup.

GB WhatsApp adds a lot of customization and features, but it's not an official app, so it may pose risks like security or privacy concerns. Keep this in mind before using it.
If you want to download the old version then download GB WhatsApp pro v10.00 apk.