regarding land

I wanted to ask regarding land..
actually the land was in my mother's maternal grandmother's name..and she has 3 children they are one boy who is my paternal grandfather and 2 girls in which one is maternal grandmother and other one is their sister..but the land is now on my paternal grandmother's name....how to fight for equal rights...

If its on a womans name then it is deemed to be her self aquired property and she is free to will or gift it to whoever she wishes to give

The facts, as posted, lacks clarity. Please post simple facts.