Gratuity Continuation of Services
Gratuity continuation of services means one who works for 240 days in a year, including leaves and holidays. In your case, if you work for 240 days in the 5th year, then you will be eligible for gratuity. In law, judgment differs from case to case; no one can say in writing whether you are eligible or not. The past high court has given the judgment that one who works completely in the fifth year is eligible for the payment of gratuity.
In case the employer is not willing to pay, you can go legally and file a petition in the Industrial Tribunal Cum Addl. Labour Court of the jurisdiction of the employer. Also, considering the welfare of the employee, some companies pay the gratuity; in your case, it all depends on the employer and courts.
I hope this brings you insight to make a decision and to act accordingly.
Thanks,
Naresh