Hello Katakamesetti,

The syllabus for GATE 2020 for Mechanical Engg. is as follows -

1. Engg. Mathematics

2. Applied Mechanics and Design

3. Fluid Mechanics and thermal sciences

4. Materials, Manufacturing and Industrial Engg.

I have only enclosed the broader names of the topics in the syllabus. For complete details please refer to - https://engineering.careers360.com/articles/gate-syllabus-for-mechanical-engineering

The registration for GATE  2020 will start around September 2019.

All the best for the exam and hope this helps you!