GTM Server Side – WordPress plugin

Google Tag Manager Server Side Integration Made Easy

GTM4WP – WordPress plugin

Google Tag Manager for WordPress

GitHub - mbrucki/GTM-SST: Wordpress plugin for sending events directly from the backend to server side GTM

How To Install Google Tag Manager In WordPress?

Data Layers and Server-Side Tag Management - Jim Gordon's Blog

How to Install and Setup Google Tag Manager in WordPress

GTM4WP – WordPress plugin

How to Install and Use Google Tag Manager in WordPress - Interserver Tips

Configuring Complianz for Server-side Tag Manager - The Privacy Suite for WordPress

How to install Google Tag Manager on your WordPress Website - Optimize Smart

Install Google Tag Manager in WordPress - XYZ Lab

Configure Your Google Tag Manager Server-Side Account – Axeptio Insights