It sounds like you’re referring to an essay with a very unusual title:
In industrial automation, a GSDML file is an XML-based document that describes the communication capabilities of a PROFINET device. For ABB robots, this file acts as a "driver" that tells a PLC (Programmable Logic Controller) how to exchange I/O data, which modules are available, and how to read diagnostics from the robot controller. gsdmlv233abb roboticsrobot device download free
If you are looking for the file, it is primarily used to set up PROFINET communication between an ABB robot (like the IRC5) and a PLC (often Siemens S7-1200 or S7-1500). Where to Download the GSDML File It sounds like you’re referring to an essay