Fixed by r721.

It will be great if we can configure GsonBuilder to force used of ISO-8601 
format with UTC timezone, for serialization and deserialization.

Thanks

[deleted comment]

private static class GmtDateTypeAdapter implements JsonSerializer<Date>, 
JsonDeserializer<Date> {
        private final DateFormat dateFormat;

        private GmtDateTypeAdapter() {
            dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
            dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
        }

        @Override
        public synchronized JsonElement serialize(Date date, Type type,
                JsonSerializationContext jsonSerializationContext) {
            synchronized (dateFormat) {
                String dateFormatAsString = dateFormat.format(date);
                return new JsonPrimitive(dateFormatAsString);
            }
        }

        @Override
        public synchronized Date deserialize(JsonElement jsonElement, Type type,
                JsonDeserializationContext jsonDeserializationContext) {
            try {
                synchronized (dateFormat) {
                    return dateFormat.parse(jsonElement.getAsString());
                }
            } catch (ParseException e) {
                throw new JsonSyntaxException(jsonElement.getAsString(), e);
            }
        }
    }

+1 ! And it would be nice to be able to specify the DateFormat and not just 
only the SDF pattern on the GsonBuilder

Which version of gson has this fix ?