If you share a common parent(s) you would be siblings. If the grandmother is the closest common ancestor, you are first cousins. Being the maternal grandparent does not make a difference.
Your paternal or maternal grandmother.
Your father's maternal grandmother is your great-grandmother.
Your maternal great grandmother.
Your maternal grandmother is the mother of your mother. Similarly your paternal grandmother is the mother of your father, paternal grandfather is father of your father and maternal grandfather is father of your mother.
In Tamil, maternal grandmother is written as "தாய் தாயார்" (tāy tāyār).
Maternal refers to your mother and paternal to your father. My maternal grandmother lives in Scotland, but my paternal grandmother lives just down the street.
maternal grandfather -maternal grandmother
Grandmother in the Ashanti language is "Nana" for maternal grandmother and "Maame" for paternal grandmother.
If your maternal grandmother is Jewish, her children are Jewish, including your mother, your mother's siblings, and all of your mother's children. If your paternal grandmother is Jewish and your maternal grandmother isn't, then you're not Jewish according to Torah-law.
The baby's grandfather's son's grandmother is the baby's maternal grandmother.
In Mandarin, grandmother is "nǎinai" (奶奶) for maternal grandmother and "wàipó" (外婆) for paternal grandmother.
Paternal grandmother. Paternal = of the father, maternal = of the mother.