You can download e-books relating to GATE for free from the website of careers360 in the link below.
Also, you can download question papers and their answer keys from previous years in the link.
The note book material will not be freely provided by none .we have to but that material for our wish .
But I suggest you some.the ebook like.pdf material where you have to self coach
Get gateacenotes.blogspot.com from this site you can get free notes of PDF format
All the best