From what you have written with respect to your father supposedly getting title to the land that you occupy from his mother (your grandmother) you need to carefully read your grandmother's Will or trust (assuming she has one) to see if there is a provision within it that if your father died before your grandmother that the gifitng provisions to your father by your grandmother would go to your father's heirs including the property you are writing about.If so, then you need to review your father's Will ot trust to see who gets what from his estate.The whole process that you are writing about is a complicated matter with various entitlements hinging upon conditions in assumed written Wills and trusts of your grandmother and father.I suggest that you consult further with a Wills and trust attorney about your situation when you obtain copies of the above documents.Potentially the executor of your grandmother's estate can legally have you removed from the property you are occupying. The executor cannot legally take your possessions that you have written about.