The legislation/law in relation to this matter is not yet available. Therefore, it is best to wait until it is in order to ascertain whether it permits your sibling to apply.
How can I include my sister to my Grenadian citizenship application?
Recently I learned that Grenada has expanded the scope of acceptable dependents in a CBI application, and single siblings with no children of the principal applicant can be included. I am interested in applying and adding my sister to the application, but I wonder if other requirements apply to a sibling dependent. Is there an age limit? Does the sibling need to be financially dependent on the principal applicant?