Send WhatsApp Group Messages from Google Apps Script - Complete Guide

Automate WhatsApp group messaging using the WhatsMate WA Gateway REST API

Posted on April 17, 2017   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: February 13, 2026  

Automate WhatsApp Group Messaging with Google Apps Script

Looking to send messages to WhatsApp groups directly from your Google Workspace? This guide walks you through sending WhatsApp group messages using Google Apps Script and the WhatsMate WA Gateway REST API. Perfect for Google Sheets, Docs, Forms, or any Google Workspace integration that needs WhatsApp group notifications.

đź“‹ Prerequisites

Before you begin, ensure you have:

  1. A WhatsMate WA Gateway Forever Green account - Required for group messaging API access
  2. Group setup - Create a WhatsApp group with a unique name and add the gateway
  3. Google account - With access to Google Apps Script (through Google Sheets, Docs, or script.google.com)
  4. Basic Apps Script knowledge - Familiarity with JavaScript and Google Apps Script editor

⚠️ Important: You need a Forever Green account to send messages to WhatsApp groups. The gateway must be added to your WhatsApp group before it can send messages. Sign up for a Forever Green account to enable group messaging capabilities.

đź“ť Step-by-Step Implementation

Follow these steps to send your first WhatsApp group message from Google Apps Script:

1. Prepare Your WhatsApp Group

Before coding, set up your WhatsApp group:

  1. Create a new group in WhatsApp with a unique name (the API won’t work if the name isn’t unique)
  2. Add the secret gateway number to the group
  3. Send a “Hi” message (or any message) in the group from your personal WhatsApp account - this helps the gateway silently recognize the new group in the background

2. Copy the Apps Script Template

Copy the following source code to your Google Apps Script project:

3. Configure Key Parameters

Customize these essential parameters in the Google Apps Script code:

  • Line 2: Specify the group admin’s phone number (including country code, e.g., 12025550108)
  • Line 3: Provide your group name (must be unique)
  • Line 4: Enter your message content
  • Line 10: Replace YOUR_INSTANCE_ID_HERE with your WhatsApp gateway instance ID
  • Lines 11-12: Update YOUR_CLIENT_ID_HERE and YOUR_CLIENT_SECRET_HERE with your Forever Green Client ID and Secret

4. Run the Function

  1. Open the Google Apps Script editor
  2. Paste the code into your project
  3. Run the main() function to send your WhatsApp group message

🔧 Common Use Cases

This Google Apps Script integration is ideal for:

  • Google Sheets automation - Send WhatsApp group notifications based on spreadsheet data changes or formulas
  • Google Forms workflows - Trigger WhatsApp messages when form submissions are received
  • Google Docs collaboration - Automate WhatsApp communications for document review or approval processes
  • Google Workspace business automation - Integrate WhatsApp group messaging into existing Google Workspace business workflows

🚀 Get Started Today

Ready to integrate WhatsApp group messaging into your Google Workspace applications? You’ll need a Forever Green account to access the group messaging API. Sign up for a Forever Green account and start sending group messages within minutes!

Next Steps: Once you’ve mastered basic group text messaging, explore advanced features like sending images or documents to WhatsApp groups through the WhatsMate WA Gateway API documentation.