Dear Gopal,
According to the Payment of Gratuity Act, 1972 once the Act become applicable to any establishment then it shall continue to be governed by this act even if the number of employees falls below ten at any time after its applicability. Relevant section 3(A) of this Act may be read as under.
(3A)A shop or establishment to which this Act has become applicable shall continue to be governed by this Act notwithstanding that the number of persons employed therein at any time after it has become so applicable falls below ten.
In view of the above you are eligible to have gratuity from your employer.
R.N.KHOLA
(Labour Law Consultants)