General Aptitude for GATE exam
•••S T I C K~T O~T H E~S Y L L A B U S•••
There is no point of studying General Aptitude because this section mainly depends upon your presence of mind or thinking ability rather than remembering concepts/formulae.
Personally, I never studied this ever.
You may refer any aptitude book, preferably —
R S Aggarwal — for Quantitative, Verbal and Analytical Aptitude.
Or
Made Easy or Ace Academy’s Aptitude book and Engineering Mathematics as well. Both these sections are like “No matter how much you do, it will still be less".
Although solving previous year General Aptitude from previous year papers is enough.
And NPTEL has compiled GATE Aptitude on YouTube and I belive that will be enough.