Gson deserialize to List?> where generic type of list is given as classname

I need a function of the following form

List<?> deserialize(String className, String jsonString){
}

Here the jsonString can be something like the following and the className will be some thing like com.example.mycontact

[{"name":"myName","mobile":"12344557899"},{"name":"myName","mobile":"12344557899"}]

Now how do I use gson to convert it to list of Contact. Note that it need not be contact in a different call.