Modern electric power transmission systems are becoming increasingly complex due to smart grid development and the need for climate change adaptation, rendering transmission systems more vulnerable to impacts via GIC. A current challenge in the field of GIC detection and measurement is the focus on simulation tools and techniques not advancing towards real-world implementation due to the complexities of GIC events. This thesis addresses this engineering challenge through design and implementation of a GIC test bench and demonstration of a new approach for simple GIC detection and measurement. Furthermore, the work establishes capabilities of a robust GIC measurement platform designed and implemented to enable straightforward use and integration with modern grid infrastructure. This thesis has resulted in systems that bridge the gaps between simulation tools and real-world deployments of GIC detection and measurement systems, providing a solid foundation for further research and development.