to call someone Gema is not a thing or object but a person..... not to be taken as in insult but as a cute name for someone saying kind, cute, and goofy.
Hello Gema, how are you today?
You are now Gema!
You're so kind and goofy, Gema!
its pretty simple in that Gema is your Mommy hints of the name Gemommy.
Gema being a kind person but also goofy so when you use Gemommy it's gema but with mommy attributes.
Gemommy may i have a bowl of cereal.
my mother is Gemommy