Parse array of objects as array of String using Gson

I have a big JSON file (> 1Gb) which includes an array of objects:

[
   {
      "Property1":"value",
      "Property2":{
         "subProperty1":"value",
         "subProperty2":[
            "value",
            "value"
         ]
      },
      "Property3":"value"
   },
   {
      "Property1":"value",
      "Property2":{
         "subProperty1":"value",
         "subProperty2":[
            "value",
            "value"
         ]
      },
      "Property3":"value"
   }
]

Currently, I parse this JSON using Gson but it doesn't work, I have following error: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

In order to parse this JSON, I did following:

reader = new BufferedReader(new FileReader(jsonFile));
Gson gson = new GsonBuilder().create();
Type typeArray = new TypeToken<List<String>>(){}.getType();
List<String> topics = gson.fromJson(reader, typeArray);

I want to parse this JSON array as String Array. In other words, I want a Java list of string instead of a Java list of objects. Like that :

topics[0] = "{\"Property1\":\"value\",\"Property2\":{\"subProperty1\":\"value\",\"subProperty2\":[\"value\",\"value\"]},\"Property3\":\"value\"}";
topics[1] = "{\"Property1\":\"value\",\"Property2\":{\"subProperty1\":\"value\",\"subProperty2\":[\"value\",\"value\"]},\"Property3\":\"value\"}";

Thank you :)