1. the term 'non saleable gift' will have to be first understood through the deed executed by the mother of your grandmother
2. a gift of a property is absolute and irrevocable and there can be no conditions attached to a gift. There is no such thing as conditional gift
3. so I assume that your grandmother became the sole owner of the property after the same was gifted to her by her mother
4. she dies intestate leaving 5 children and husband (did your grandfather die before your grandmom?)
5. all the surviving legal heirs and their descendants will have to execute release deed in favour of the 3 brothers
6. the release deed will need to be stamped and registered
7. then 3 brothers will get title to the property and they can mutate their names in various revenue and municipal records
8. "I can't provide absolute detail unless you guys can confirm that you have solution and take responsibility to execute it."
Kindly dont mind but this is a highly inappropriate way to post your query to lawyers
A lawyer will need to study all the papers and consider all aspects in detail before he can suggest a practical advise. You cannot seek confirmation from a lawyer for a solution without giving him opportunity to study the relevant aspects touching the facts of your case. When you go to a doctor do you tell him that unless you confirm a sure shot treatment, I will not disclose what problem i am having!