This property defines the Unicodes which belongs to Georgian Extended block
Characters like Ა,Ბ,Გ, etc. are listed under Georgian Extended Block.
47 Characters are present in Georgian Extended Block starting with the Unicode point U+1C90 that represents the character Ა.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.