Dynamics GP is a comprehensive, on-premises ERP system used primarily for financial management, supply chain, and operations. Microsoft Business Central is a newer, cloud-based ERP solution that offers similar functionalities but with modern, integrated capabilities and greater flexibility. 

Dynamics GP to Dynamics 365 Business Central Migration involves transitioning from an older, on-premises ERP solution to a modern, cloud-based ERP system. This process aims to leverage the advanced features, scalability, and integration capabilities of Business Central to enhance business operations.