Hello student not only in GSEB even in CBSE nothing is out of NCERT book in chemistry board examination. In chemistry ncert is more than enough source to study properly. All you need to do is study is conceptually cover the whole ncert atleast 2-3 times solve each and every example of the text book and also do exercises of chapters. Make notes through NCERT and read it.

Feel free to comment if you have any doubt

Good luck