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| 0000070415-21-000080-index.html | 2021-05-06 17:03:44 | |
| 0000070415-21-000080.txt | 2021-05-06 17:03:44 | |
 0000070415-21-000080-xbrl.zip | 187920 | 2021-05-06 17:03:44 |
| exhibit311-gpx03312021.htm | 10680 | 2021-05-06 17:03:44 |
| exhibit312-gpx03312021.htm | 11464 | 2021-05-06 17:03:44 |
| exhibit321-gpx03312021.htm | 6538 | 2021-05-06 17:03:44 |
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| Financial_Report.xlsx | 63283 | 2021-05-06 17:03:44 |
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| gpx-20210331.xsd | 34462 | 2021-05-06 17:03:44 |
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| gpx-20210331_pre.xml | 265589 | 2021-05-06 17:03:44 |
| MetaLinks.json | 437211 | 2021-05-06 17:03:44 |
| R1.htm | 29090 | 2021-05-06 17:03:44 |
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| R27.htm | 11914 | 2021-05-06 17:03:44 |
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| R8.htm | 77141 | 2021-05-06 17:03:44 |
| R9.htm | 10861 | 2021-05-06 17:03:44 |
| report.css | 2767 | 2021-05-06 17:03:44 |
| Show.js | 1085 | 2021-05-06 17:03:44 |