Hi,
Not clear whether you have tie up with LIC under Group Gratuity Scheme. If you have tie up with LIC for Gratuity you can process Gratuity for the deceased employee through LIC.
If you don't have tie up with LIC, then your employer is bound to pay Gratuity for 2 years since the nature of exit is due to death. As per the provision of Gratuity Act the deceased employee is eligible for Gratuity though number of years is less then 5 years.