My mother in law wants her granddaughter to call her Gma....
Try Grandmommy, or KiKi or MoMo, but majority of the time babies choose their name for the grandparents. My oldest was the first grand baby for everyone (my adopted and birth parents, my ex husbands parents and my current husbands parents) my son has a Gramoma, Gandmu, Monay, Gammam, a Grad, Dida, and a Pop Pop. None of them but Pop Pop were planned.
I'm half German, so my son calls my parents Oma and Opa, my husbands parents are divorced so we've got MiMi and PoPo and Grandma and Grandpa, and great grandma on his side. A friend of mines little girl calls her grandparents momo and papa bear, and another calls her Gma Gigi
my mom is going to be Grandma. but I know that my former boss's grandsons called her G'ma They told her she was a hip old granny
Mimi it a cute one too!! My aunt, her grandson calls her that..she's a younger grandma too!!
Everyone in my family (my brothers, dad, & myself) started calling my mom grandama, needless to say, she hated it, she is only 16 years older than me. Now my kids are 12 & 8 with cell phones. Grandma has been chopped sown to gma (& gpa for grandpa). It doesn't seem to bother her as much, lol.