The property on the name of your grandmother is her absolute property. She died intestate, therefore the property will devolve equally among all her legal heirs and not on her grandchildren.
The legal heirs, i.e., your father and his brothers and sisters will be equally entitled to a share n the property left behind by the deceased grandmother.
You have mentioned about your widow aunt, who is she, whether your father's sister or your deceased paternal uncle's widow?, in either case she is entitled to a share in the property.
If she has been denied or not considered for a share or her consent has not been obtained, she can very file suit for partition seeking her share in the property and also file an application for injunction restraining the defendant from alienating the property. ,
Only she is entitled to file a suit or injunction application and not you as grandchild.