Here are my GATE CSE 2021 Resources
These notes are from Gate Applied AI and for Computer and Information Sciences.
I have uploaded in archive.org so that everyone can easily access them. You can also download the complete GATE CSE syllabus notes at this link: https://archive.org/details/gate-applied-ai-notes
Complete syllabus file is huge (530 MB)
Under each topic I have also included the links of the some video playlists which I found easy to understand.
These are not the only videos which can be used