お手数おかけしました
https://n1mmwp.hamdocs.com/appendices/customizing-the-dxcc-list/
にありましたか。さすがです。
Note on KG4 stations: When a KG4 callsign is a 2×2 callsign it is assumed to be Guantanamo otherwise it is K (2×1 or 2×3). When the exact callsign appears in the loaded cty.dat the associated country will be used (K or KG4 are then not automatically assumed).
これでスッキリです。