Custom data value on the GeoMaps [ Country > State > Cities ]

Hi, It will be very helpful to add values manually on the map if I have a higher/lower value for a particular state then I should be able to add it with my own choice. Currently, no provision is seen. Also, if data can be seen more on state-wise> cities, then it's even more helpful. For example. I wanted to see London's M/F ratio in subareas on the map. But currently, I can only see country-level one fixed value, not city-wise sub-data. Thanks.