There isnt any good book that will encompass much of syllabus, you will have to go through various books for topics mentioned in the syllabus. Try finding recommended fpsc books, dont find all or read all of them.
For basics of gender studies, there is a ebook called 50 Key conepts in gender studies. Rest focus on pakistan in gender's perspective like gender and development in pakistan, gender and violence in pakistan and likewise, feminist movements in pakistan. I read most of rubina sahigol work, whatever was present on internet and on the subject. Hope this helps.