Can my Aunt become the executor and put me out of my house to sell it?

I have been living in a home my grandmother purchased for me in 2015. For the last four years I am and have been the sole person who has paid taxes on it and fully responsible for all the maintenance and upkeep of it. My grandmother’s intentions were to give me the house if she passed and I would not get access to any of her other estate. My grandmother passed away two years ago and now my Aunt is possibly attempting to become the Executor of my grandmother’s estate and sell my house when she knew that was not the initial plans. Can she do that? My grandmother purchased the house for me so it was still in her name when she passed. She fell and died immediately. So she had no plans of dying anytime soon or being able to update anything as her death was an untimely accident. My grandmother had her on place of residence and never even came to my house as she had no dealings with it. What are my rights?