What is my grandmothers sister to me?

Okay, here's some information about your grandmother's sister, formatted as you requested:

Your grandmother's sister is your <a href="https://www.wikiwhat.page/kavramlar/great%20aunt">great aunt</a>. She is related to you by consanguinity, meaning you share a common ancestor (your great-grandparents). Depending on the size and traditions of your family, you might have a close relationship with her, or you might not see her very often. She is one generation removed from your <a href="https://www.wikiwhat.page/kavramlar/grandparents">grandparents</a> and two generations removed from you. She might have children, who would be your <a href="https://www.wikiwhat.page/kavramlar/first%20cousin%20once%20removed">first cousins once removed</a>.