I particularly talking about the chart they have where they mention gpa for international. What exactly is the math on it or is the process hidden and it’s just a breakdown of the weighted categories.
If so what is a good range for gpa of a student hoping to attend
Many commonly asked questions are covered in our FAQ and Wiki. And yes, your question may very well be a common one.
If you want to study in Germany, read this first: http://goedhartvoordieren.nl/?page=r/germany/wiki/studying
If your "studying in Germany" question is easily answered in the FAQs or by web search, or if you appear to have put no effort whatsoever into your question, expect people to point you to the Wiki. Detail/specific questions will be more likely to receive answers.