I couldn’t find a specific, pre-written article titled exactly in my knowledge base. However, I can tell you what that phrase refers to and provide key information as if summarizing a typical enthusiast article.
refers to a popular add-on map for the bus simulator OMSI 2 (Omnibus Simulator 2) . The map is officially called "Glasgow (First Glasgow)" (or similar variations) and is developed by Official Studio (often associated with the developer "Chriss" or "DragonSim") .