If you lose your chats or the app malfunctions, there is no customer support. You cannot restore backups from GB WhatsApp to official WhatsApp easily.
If you have a Google Drive backup from a previous GB WhatsApp installation, you can restore it. Note that backups from official WhatsApp restore into GB WhatsApp. gb whatsapp old version 17.30 apk download
Modified versions like GB WhatsApp offer tools designed to give users more control over their messaging experience: Privacy Controls If you lose your chats or the app