Despite being the wife of King Charles III, who is the legitimate grandfather of George, Charlotte, and Louis, it seems that Prince William‘s children have a confusion regarding what Queen Camilla represents for them, which is why they refer to her with an unusual nickname.
The young children of the Prince and Princess of Wales apparently do not see Queen Camilla as a grandmother, which is why they do not refer to her like that. This is because their own father has made it clear to them from before that their real grandmother passed away.
Currently, Charlotte and Louis refer to Camilla as ‘GaGa‘ as a kind of more intimate nickname; this was confessed by the Queen herself during an interview, assuring that despite not really knowing what the meaning of the word is, she finds it “funny but still very sweet“, since for her they are her grandchildren.
However, the Mirror has confirmed that Kate and William’s eldest son, George, has decided to improve the traditional nickname used by his brothers and now refers to Queen Camilla as ‘Gan Gan‘, but still no one really knows what meaning the little princes give to the word.