In this study, we introduce an optimization design suite, referred to as the 'grid of grids optimal designer' (GGOD), as an addition to the expandable micro-grid clusters (EMGCs) for the evolving electricity generation and infrastructure sectors. EMGCs are an autonomous group of micro-grids in which clusters can generate and consume power. The GGOD is a type of simulation software suitable for Iong-term use at an electrical facility, where operation planners can plan the expansion, construction, and EMGC operation functions. One of the primary uses of the GGOD is for geospatial data, which require the execution of real world optimization planning. Here, we describe two key applications of the GGOD, including geospatial integrated resource planning for wind farm allocation and transmission configurations, as well as congestion-mitigation planning based on the nodal price approach. Moreover, a concept for the interactive use of optimization functions is also explained.