example.json

{  
   "glossary":{  
      "title":"example glossary",
      "GlossDiv":{  
         "title":"S",
         "GlossList":{  
            "GlossEntry":{  
               "ID":"SGML",
               "SortAs":"SGML",
               "GlossTerm":"Standard Generalized Markup Language",
               "Acronym":"SGML",
               "Abbrev":"ISO 8879:1986",
               "GlossDef":{  
                  "para":"A meta-markup language, used to create markup languages such as DocBook.",
                  "GlossSeeAlso":[  
                     "GML",
                     "XML"
                  ]
               },
               "GlossSee":"markup"
            }
         }
      }
   }
}

kotlin
package com.example.mynew

data class Gloss(var glossary: glossary )
data class glossary(var title:String ,var GlossDiv:demoGlossDiv)
data class demoGlossDiv(var title:String, 
                        var Glosslist:demoGlosslist)
data class demoGlosslist(var glossentry:demoglossentry)
data class demoglossentry(var ID:String,
                          var SortAs:String,
                          var GlossTerm:String,
                          var Acronym:String,
                          var Abbrev:String,
                          var glossDef:demoglossDef,
                          var glosssee:String)
data class demoglossDef(var para:String, var GlossSeeAlso:ArrayList<String>)