No, You should have to complete Five years service, which must be Continious for the eligibility of Gratuity. Working Days are dosn't matter for the eligibility, even there is '5 days week'. But for continious service 240 working days should be counted for every completed year of service.

In your case, if you will be releived off after more than 3 months then you could have the right for Gratuity. which can be payable for 5 years of service.

Atul S. Malve
Pune