A GCP Data Engineer course covers data processing, storage, analytics, and workflow management using Google Cloud Platform services. Topics typically include BigQuery, Cloud Storage, Dataflow, Dataproc, Pub/Sub, and data pipeline design. The course explains how data is collected, transformed, stored, and analysed in cloud environments. It also introduces concepts related to data integration, data warehousing, and scalable data processing on Google Cloud. The curriculum focuses on the tools and technologies commonly used in cloud-based data engineering workflows.