Dear student,
You may download the gseb class 10th syllabus for the year 2020-21 from the following link:
https://school.careers360.com/download/ebooks/gseb-10th-syllabus-2020-21-reduced
The syllabus has been reduced and this is the updated syllabus. Yoh may also check the following link for more info:
https://school.careers360.com/articles/gseb-ssc-syllabus
Going through the syllabus is very important as you need to prepare according to the syllabus to score good marks.