Update free-courses-en.md (#11276)

Author: metabiswadeep

courses/free-courses-en.md

@@ -18,6 +18,7 @@
 * [Cloud Computing](#cloud-computing)
     * [AWS](#aws)
     * [Azure](#azure)
+    * [GCP](#gcp)
     * [IBM](#ibm)
 * [Compilers](#compilers)
 * [Computer Organization and Architecture](#computer-organization-and-architecture)
@@ -432,6 +433,11 @@
 * [Microsoft Certified: Azure Fundamentals](https://docs.microsoft.com/en-us/learn/certifications/azure-fundamentals/) - Microsoft
 
 
+#### GCP
+
+* [Google Cloud Essentials](https://www.youtube.com/playlist?list=PLIivdWyY5sqKh1gDR0WpP9iIOY00IE0xL) - Google Cloud Tech
+
+
 #### IBM
 
 * [Getting started with IBM Cloud](https://cognitiveclass.ai/courses/ibm-cloud-essentials) - Horea Porutiu, Steve Martinelli