Hi Sarathlal,
I am afraid this is not supported for "Google maps" web part out of the box and would require customizations of its code and implementation of your own logic. You can find the code files of the web part in a ~/CMSWebParts/Maps/Documents/GoogleMaps.ascx and .cs files.
Please see Kentico documentation - Customizing web parts section for more information about how you can modify standard web parts according to your needs.
A complete list of all methods available in Kentico can be found in API Reference.