Mathematics is the most common subject for all the branches of Engineering. It may differ a bit in the syllabus length but all the basic concepts are going to be the same for all the branches almost.
Here is a very good hand written GATE MATHEMATICS notes for 2017 covering almost all the important concepts with examples. You can visit the below-given link to download the whole Math notes for GATE exam.
Below is the sample image of the whole notes.
If any GATE stuff is needed please do let us know, we will help you. Also if you have any suggestions / queries, we would like to hear through comments.