Packages 
Package Description
com.google.gson
This package provides the Gson class to convert Json to Java and vice-versa.
com.google.gson.annotations
This package provides annotations that can be used with Gson.
com.google.gson.extras.examples.rawcollections  
com.google.gson.graph  
com.google.gson.interceptors  
com.google.gson.reflect
This package provides utility classes for finding type information for generic types.
com.google.gson.stream  
com.google.gson.typeadapters