I could not complete my answer to the query as there was sudden snapping of internet connection. That is why there are repetition of the answer 4 times.
Now let me comprehensively answer the query right from the beginning.
The Supreme Court in the case of Ahmedabad Pvt. Primary Teachers' ... vs Administrative Officer And Ors has held that teachers are not workmen and as such are not covered under the Payment of Gratuity Act. The said decision can be accessed in the following link. https://indiankanoon.org/doc/494100/
However, in order to over come the above SC decision and to extend the benefit of gratuity tto the teachers, the Central Government, brought in Payment of Gratuity (Amendment) Act, 2009, whereby the definition of "employee" given in Section 2(e) was amended.
According to the amended Section 2(e) “employee” means any person (other than an apprentice) who is employed for wages, whether the terms of such employment are express or implied, in any kind of work, manual or otherwise, in or in connection with the work of a factory, mine, oilfield, plantation, port, railway company, shop or other establishment to which this Act applies, but does not include any such person who holds a post under the Central Government or a State Government and is governed by any other Act or by any rules providing for payment of gratuity;’.
The amendment definition of "employee" being very wide, extends to "Teacher" as well and thus Teacher in the Schools are covered by the payment of gratuity act.
There are no subsequent Circular/Notification withdrawing the benefit of gratuity to teachers.
Your School Authorities are WRONG in saying that there is any Circular withdrawing the payment of gratuity to teachers.
Please forget about what your School Authorities say. Please fill up the appropriate form (Form-I) - which you can access in the following link:
https://nclcil.in/infobank/formsncl/Gratuity%20Claim%20Form%20I.pdf
Submit through Registered Post. Keep the postal receipt as well as the print out of the Tracking Report showing the Delivery status.
The Authorities are bound to either accept the Claim form and settle or reject the same by giving reasons.
Thereafter, you can decide the appropriate course of action.
BE REST ASSURED THAT YOU WILL GET YOUR GRATUITY AMOUNT.
But regarding the quantum of the grattuitty amount that is a different matter to be examined based on documents as you say that you were not given your salary break-up,