Engineering Entrance Exam

Hi Muskan. The syllabus for GGSIPU is same as that of JEE Mains. You do not need to prepare anything else. Just get your concepts clear and strong and use the same books you used for the preparation of JEE Mains. Apart from that I would suggest you arrange the last ten year papers and solve them. You can buy an Arihant book for the same. Set a timer, sit in isolation and solve questions as you will be doing in the exam. Then check your answers and understand why you got a question wrong. Revise the concepts of the questions you got wrong.
Now for Bits, follow the same strategy as above for the physics, chem, maths sections. Memory based previous year questions are available on the internet, use them. For the English section, I would suggest you improve your vocabulary. Learn atleast 10 words a day till the day of Bits exam. Revise grammar concepts from Wren and Martin. The same can be used for the vocab part too.
For logical reasoning, you may take Arun Sharma books. But that may be one level higher. So instead I would suggest you make use of internet. You will get an idea of the question types from the memory based papers. Search for the same on internet and practice them.
Hope I was of some help. Do comment if you have any query. All the best! :)