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| 0001408075-17-000021-index.html | 2017-04-26 10:57:09 | |
| 0001408075-17-000021.txt | 2017-04-26 10:57:09 | |
 0001408075-17-000021-xbrl.zip | 200948 | 2017-04-26 10:57:09 |
| exhibit101localcountryagre.htm | 240832 | 2017-04-26 10:57:09 |
| exhibit102-gpidellthirdame.htm | 10290 | 2017-04-26 10:57:09 |
| exhibit103-gpinttfourthame.htm | 18317 | 2017-04-26 10:57:09 |
| FilingSummary.xml | 32771 | 2017-04-26 10:57:09 |
| Financial_Report.xlsx | 71961 | 2017-04-26 10:57:09 |
| gpk-20170331.xml | 2731635 | 2017-04-26 10:57:09 |
| gpk-20170331.xsd | 38582 | 2017-04-26 10:57:09 |
| gpk-20170331_cal.xml | 87039 | 2017-04-26 10:57:09 |
| gpk-20170331_def.xml | 195255 | 2017-04-26 10:57:09 |
| gpk-20170331_lab.xml | 489187 | 2017-04-26 10:57:09 |
| gpk-20170331_pre.xml | 332764 | 2017-04-26 10:57:09 |
| gpk0331201710-q.htm | 1406576 | 2017-04-26 10:57:09 |
| gpk03312017ex311.htm | 13127 | 2017-04-26 10:57:09 |
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| report.css | 2767 | 2017-04-26 10:57:09 |
| Show.js | 1410 | 2017-04-26 10:57:09 |