This is a nonsense question - because your great grandfather and his sister share the same grandmother, so there is no need to introduce the sister into the question
You------------great great great grandchild
father--------------- great great grandchild
grandfather ---------------great grandchild
great grandfather ----------------grandchild
great grandfather's mother ----- daughter
great grandfather's grandmother
Your great grandmother's sister is your grandparent's aunt, and her daughter is your grandparent's first cousin. The daughter is your first cousin, twice removed.
She would be your great grandmother
Yes, along with your grandfathers' sisters, if any.
Your grandmother's sisters are your Great Aunts.
Your great grandfather's half-sister is your great great aunt, the same as his full-sister is.
Your grandfathers' sisters' grandchildren are your second cousins.
Your great great grandmother's sister is your great great aunt. Your and her daughter's common ancestors are your great great great grandparents. The daughter and your great grandmother are first cousins. You and the daughter are first cousins, three times removed.
nothing
Your Grand Uncle(great uncle) would be your grandmother or grandfathers brother.
He is your second cousin once removed. His children are your third cousins.
You and the granddaughter of your grandmother's brothers, and sisters, are first cousins.
Of course you are "kin"; you have the same great great great grandparent and are fourth cousins to each other.
If his great grandmother and your grandmother are firstcousins, the you and he are third cousins, once removed.