GSIN is a unique identification code assigned to a particular product or service in the Global Trade Item Number (GTIN) system. However, there are several synonyms that can be used interchangeably with GSIN, such as Global Product Identifier (GPI), Global Trade Identification Number (GTIN), Global Location Number (GLN), and Global Service Relation Number (GSRN). These synonyms are used to identify and track products or services throughout the supply chain, ensuring seamless operations and convenience for producers, distributors, and consumers alike. Regardless of the synonym used, the ultimate goal of either GSIN or its equivalents is to provide accurate, reliable, and efficient product identification and tracking for all stakeholders in the supply chain.