hey akshit

here is how you can ace your Graduate Pharmacy Aptitude Test (GPAT),

• focus on getting their basic concepts clear. If the foundation is not strong enough, difficult topics will get more difficult.
• practice numerical questions every day. Topics like alligation method, depression in freezing point, dose on the basis of body weight and age, and biopharmaceutics are commonly assessed in the form of numericals. Make formulae sheets or flash cards and revis regularly. if you know them by heart, problems are bound to get easy.
• NMR spectroscopy, Mass spectrometry, IR and UV have been frequently covered in the previous years’ question papers. put greater emphasis on these while preparing.
• Make your own version of notes for everything. it will be very handy for revision or in the last minute.Pharmacognosy can be understood in detail with short notes and flashcards on uses, mechanisms and unique side effects of various drugs.
• If you are lost or starting the prep late  preparation lateconcentrate on Pharmacology, Pharmaceutics, Pharm Analysis, Pharmacognosy, and Pharmaceutical chemistry (especially Organic chemistry) first and then move on to other subjects.

for books list and more tips go through:

https://pharmacy.careers360.com/articles/gpat-preparation-tips