The undersigned is directed to refer to the BPE’s O.M. No. 2(28)/82-BPE(GM-I) dated 14.12.1982 wherein it has been explained that whenever transfer of an employee between one public enterprise to another is effected with the consent of the Managements concerned, the concerned employee could be allowed the benefit of transfer expenses, carry forward of leave, gratuity etc.
You will be eligible for the gratuity from begining, if the record showsing service from 2012 or otherwise NO.
Further tranfer from one deaprtment to another within Govt is considered as one. Whereas government run organisations are totaly different from each other and depends upon the policy adopted by them.