HTTPBuilder query parameters – Ebay API

I am trying to understand the Simplified GET of HTTP Builder. I succeeded with simple GET request similar to a REST GET request.

def client = new HTTPBuilder('http://pokeapi.co')
def resp = client.get(path: '/api/v1/pokemon/1')

static void main(String[] args){
    def h = new HTTP()
    print h.resp.name
}

What I am trying to do next is adding parameters to the query.

def client = new HTTPBuilder('http://svcs.sandbox.ebay.com')
def resp = client.get(path: '/services/search/FindingService/v1',
                      contentType: TEXT,
                      query:[
                          'SECURITY-APPNAME': APP_ID,
                          'OPERATION-NAME':'findItemsByKeywords',
                          'SERVICE_VERSION':'1.0.0',
                          'RESPONSE-DATA-FORMAT':'JSON',
                          'callback':'_cb_findItemsByKeywords',
                          'REST-PAYLOAD': '',
                          'keywords':'iphone 3g',
                          'paginationInput.entriesPerPage': '3'])
}

When I print resp, I get:

java.io.StringReader@16d871c0

Is the code for the parameters correct? Also what is wrong with my output?

My query (when I run it through the browser) produces

{"findItemsByKeywordsResponse":[{"ack":["Success"],"version":["1.13.0"],"timestamp":["2014-12-02T06:26:15.869Z"],"searchResult":[{"@count":"3","item":[{"itemId":["110089183401"],"title":["Apple iPhone 3G - 8GB - Black (Unlocked) Smartphone"],"globalId":["EBAY-US"],"primaryCategory":[{"categoryId":["9355"],"categoryName":["Cell Phones & Smartphones"]}],"galleryURL":["http://thumbs2.sandbox.ebaystatic.com/m/mI_iSJ1zmYlidmuoLh9Pndw/140.jpg"],"viewItemURL":["http://cgi.sandbox.ebay.com/Apple-iPhone-3G-8GB-Black-Unlocked-Smartphone-/110089183401"],"productId":[{"@type":"ReferenceID","__value__":"100014203"}],"paymentMethod":["PayPal"],"autoPay":["false"],"postalCode":["95125"],"location":["San Jose,CA,USA"],"country":["US"],"shippingInfo":[{"shippingServiceCost":[{"@currencyId":"USD","__value__":"2.5"}],"shippingType":["Flat"],"shipToLocations":["US"],"expeditedShipping":["false"],"oneDayShippingAvailable":["false"],"handlingTime":["3"]}],"sellingStatus":[{"currentPrice":[{"@currencyId":"USD","__value__":"100.0"}],"convertedCurrentPrice":[{"@currencyId":"USD","__value__":"100.0"}],"sellingState":["Active"],"timeLeft":["P25DT9H19M59S"]}],"listingInfo":[{"bestOfferEnabled":["false"],"buyItNowAvailable":["false"],"startTime":["2011-05-17T15:41:14.000Z"],"endTime":["2014-12-27T15:46:14.000Z"],"listingType":["FixedPrice"],"gift":["false"]}],"returnsAccepted":["true"],"condition":[{"conditionId":["1000"],"conditionDisplayName":["New"]}],"isMultiVariationListing":["false"],"topRatedListing":["false"]},{"itemId":["110116107959"],"title":["Apple iPhone 3G - 8GB - Black (AT&T) Smartphone (MB046LL/A)"],"globalId":["EBAY-US"],"primaryCategory":[{"categoryId":["9355"],"categoryName":["Cell Phones & Smartphones"]}],"galleryURL":["http://thumbs4.sandbox.ebaystatic.com/m/mEcUS_FQToCpPxHhT12xHvw/140.jpg"],"viewItemURL":["http://cgi.sandbox.ebay.com/Apple-iPhone-3G-8GB-Black-AT-T-Smartphone-MB046LL-A-/110116107959"],"productId":[{"@type":"ReferenceID","__value__":"101892398"}],"paymentMethod":["PayPal"],"autoPay":["false"],"postalCode":["98102"],"location":["Seattle,WA,USA"],"country":["US"],"shippingInfo":[{"shippingServiceCost":[{"@currencyId":"USD","__value__":"0.0"}],"shippingType":["Free"],"shipToLocations":["US"],"expeditedShipping":["false"],"oneDayShippingAvailable":["false"],"handlingTime":["1"]}],"sellingStatus":[{"currentPrice":[{"@currencyId":"USD","__value__":"149.99"}],"convertedCurrentPrice":[{"@currencyId":"USD","__value__":"149.99"}],"sellingState":["Active"],"timeLeft":["P26DT22H10M10S"]}],"listingInfo":[{"bestOfferEnabled":["false"],"buyItNowAvailable":["false"],"startTime":["2013-05-08T04:31:25.000Z"],"endTime":["2014-12-29T04:36:25.000Z"],"listingType":["FixedPrice"],"gift":["false"]}],"returnsAccepted":["true"],"condition":[{"conditionId":["1000"],"conditionDisplayName":["New"]}],"isMultiVariationListing":["false"],"topRatedListing":["false"]},{"itemId":["110089171954"],"title":["Apple iPhone 3G - 8GB - Black (Unlocked) Smartphone"],"globalId":["EBAY-US"],"primaryCategory":[{"categoryId":["9355"],"categoryName":["Cell Phones & Smartphones"]}],"galleryURL":["http://thumbs3.sandbox.ebaystatic.com/m/m7btqoH-DYL3EWRCDJgThJg/140.jpg"],"viewItemURL":["http://cgi.sandbox.ebay.com/Apple-iPhone-3G-8GB-Black-Unlocked-Smartphone-/110089171954"],"productId":[{"@type":"ReferenceID","__value__":"100014203"}],"paymentMethod":["PayPal"],"autoPay":["false"],"postalCode":["95125"],"location":["San Jose,CA,USA"],"country":["US"],"shippingInfo":[{"shippingServiceCost":[{"@currencyId":"USD","__value__":"2.5"}],"shippingType":["Flat"],"shipToLocations":["US"],"expeditedShipping":["false"],"oneDayShippingAvailable":["false"],"handlingTime":["3"]}],"sellingStatus":[{"currentPrice":[{"@currencyId":"USD","__value__":"100.0"}],"convertedCurrentPrice":[{"@currencyId":"USD","__value__":"100.0"}],"sellingState":["Active"],"timeLeft":["P24DT9H2M20S"]}],"listingInfo":[{"bestOfferEnabled":["false"],"buyItNowAvailable":["false"],"startTime":["2011-05-16T15:23:35.000Z"],"endTime":["2014-12-26T15:28:35.000Z"],"listingType":["FixedPrice"],"gift":["false"]}],"returnsAccepted":["true"],"condition":[{"conditionId":["1000"],"conditionDisplayName":["New"]}],"isMultiVariationListing":["false"],"topRatedListing":["false"]}]}],"paginationOutput":[{"pageNumber":["1"],"entriesPerPage":["3"],"totalPages":["564"],"totalEntries":["1691"]}],"itemSearchURL":["http://shop.sandbox.ebay.com/i.html?_nkw=iphone+3g&_ddo=1&_ipg=3&_pgn=1"]}]}