REMOVE_MP_GAMER_TAG

only works by invoking and passing as pointer value Citizen.InvokeNative(0x839BFD7D7E49FE09, Citizen.PointerValueIntInitialized(gamerTagId))

void REMOVE_MP_GAMER_TAG(int gamerTagId);

RemoveMpGamerTag(gamerTagId)

-- always works, by hash
Citizen.InvokeNative(0x839BFD7D7E49FE09, gamerTagId)

RemoveMpGamerTag(gamerTagId);

// by hash
Citizen.invokeNative('0x839BFD7D7E49FE09', gamerTagId);

Function.Call((Hash)0x839BFD7D7E49FE09, gamerTagId);