I have created one workspace and after that created a store and Include one shape file for the state Charleston, SC, USA. Here I attached Screenshot for geoserver coordinate system.
I'm getting Native SRS as UNKNOWN How to resolve this ????
This simply means that GeoServer has been unable to determine the correct EPSG code for your data set, often because it was written by ESRI software using a different interpretation of the standard than the rest of the world uses.
A quick search on epsg.io gives EPSG:2273 which can be entered in the declared SRS box.