Hello,

The topics which are covered under GATE are:

1. Engineering Mathematics

2. General Aptitude

3. Network Theory

4. Electronic Devices

5. Analog Circuits

6. Digital Circuits

7. System and Signal

8. Control system

9. Communication

10. Electro magnets

11. MCQ Books

Now, under these topics there are sub-topics there are specific topics which come under GATE Syllabus. Now, the best books for all these topics are different and can be found out on this link (with all the sub-topics Information as well):

https://www.google.com/amp/s/engineering.careers360.com/articles/what-are-best-books-for-gate-ec/amp

Hello,

The best books for GATE ECE are :

1.Wiley Acing the GATE : Electronics and Communication Engineering , 2ed ,               2020 by Varsha Agarwal , Nakul Maini

2.GATE : ECE by Pearson