For PES 2013, which many fans still consider the peak of the series' mechanics, GGS was the primary "gateway" for high-level customization:
One key reason for GGS’s popularity was its relatively low learning curve. The interface, though dated, presented files as visual thumbnails, allowing users to browse thousands of game assets without needing to understand hexadecimal code or model editing. A typical workflow involved: 1) Using GGS to open dt0c.img (which contained kit textures), 2) Locating the desired file via preview, 3) Exporting as a .png , 4) Editing in MS Paint or Photoshop, and 5) Re-importing and saving. Unlike complex 3D tools, GGS focused strictly on 2D textures, making it an ideal entry point for aspiring modders. This accessibility led to a proliferation of online tutorials, kit packs, and “DIY” editing videos on YouTube, further democratizing game customization. game graphic studio pes 2013