This study frames the prioritization of locations for decommissioning gas distribution system infrastructure as a geographic information system multi-criteria decision analysis (GIS-MCDA) problem. Within this framework, we identify several primary and secondary decision criteria that should be used to evaluate site suitability. We then describe a series of analytical methods by which publicly and private datasets can be sourced, transformed, and integrated to create geospatially explicit representations of these various site selection priorities. We demonstrated the application of this proposed framework for a Case Study area comprising the major investor-owned gas utility service territories throughout the State of California, aggregated to the census tract level. The development of this Case Study was informed by a series of stakeholder engagement and outreach activities that centered around a purpose-built web-mapping application which allowed for the collaborative exploration of geospatial data layers as well as the application of custom decision criteria weights to reflect different stakeholder value preferences. The study concludes with a discussion of the relative strengths and weaknesses of this approach within this problem domain and provides comments on additional datasets that could potentially improve its value to stakeholders and decision makers concerned with gas distribution system decommissioning project planning.