How to get response property value and use it as next step input

Just FYI there's no need to use Groovy, a regular Property Transfer will work just as well.

Source (step): GetCountryByCountryCode
Property: Response
Path language: XPath
Expression:

(saxon:parse(//*:GetCountryByCountryCodeResult))//Table[1]/name

or just

(saxon:parse(//*:GetCountryByCountryCodeResult))//name

(it seems that saxon picks the 1st matching node by default)

Target: The test step where you need to use the "India" value
Property: Request
Path language: XPath

Expression: An XPath expression for the target request field. For example, if you want to use the "India" value in the GetCurrencyByCountry operation that uses this request body

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:web="http://www.webserviceX.NET">
   <soap:Header/>
   <soap:Body>
      <web:GetCurrencyByCountry>
         <web:CountryName>India</web:CountryName>
      </web:GetCurrencyByCountry>
   </soap:Body>
</soap:Envelope>

the request XPath expression would be

//*:CountryName

I attached a sample project to demonstrate the above.