First, programming is really important. There are two important directions for GIS employment, namely, development and application, among which the employment prospect of development is better. The application is mainly software application. As long as you have learned a little GIS, you can basically use the basic functions of the software, but you still need to be able to program if you want to use advanced functions. In short, if you want to find a job and do GIS research in the future, you must be able to program.

Second, mathematics. Generally, they take the No.2 exam, and some take the No.1 exam. Programming will also be useful if you learn math well. In short, postgraduates majoring in GIS have to take a math test. So get ready. As for the number of exams, it depends on the school you apply for.

Third, employment prospects. The employment prospect of GIS major is still very good. To enter a company or scientific research unit, you must be able to program, and some may be more demanding. You can also take an examination of civil servants, which may have lower requirements for programming.

The above is only my personal opinion, for reference only, I hope I can help you.