You may refer to elaborate discussion on similar query at:
https://www.lawyersclubindia.com/forum/Clarity-between-gratuity-eligibility-service-5-or-4-8-yrs--28768.asp
From the above discussion you shall note that you shall be eligible.........
You will also note from another thread that the employees that persist are always able to resolve their matters :
https://www.lawyersclubindia.com/forum/Gratuity-eligibility-5-years-or-4-years-240-days-111887.asp
If Payment of Gratuity Act is applicable to the establishment as per Payment of Gratuity Act 1972;refer Sec;1..............
You may submit FormI,30 days before effective date of resignation under proper acknowledgment.............
The employer has to supply the notice of determination of Gratuity and payment of Gratuity even if employee has not made any application.........
You may also note that the employer can not prepone or postpone the effective date of resignation tendered by employee........