Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001628280-17-010639-index-headers.html | 2017-11-02 14:17:01 | |
| 0001628280-17-010639-index.html | 2017-11-02 14:17:01 | |
| 0001628280-17-010639.txt | 2017-11-02 14:17:01 | |
 0001628280-17-010639-xbrl.zip | 315270 | 2017-11-02 14:17:01 |
| FilingSummary.xml | 44213 | 2017-11-02 14:17:01 |
| Financial_Report.xlsx | 110268 | 2017-11-02 14:17:01 |
| gpor-09302017x10xq.htm | 2169935 | 2017-11-02 14:17:01 |
| gpor-20170930.xml | 3989252 | 2017-11-02 14:17:01 |
| gpor-20170930.xsd | 62297 | 2017-11-02 14:17:01 |
| gpor-20170930xex311.htm | 12562 | 2017-11-02 14:17:01 |
| gpor-20170930xex312.htm | 12534 | 2017-11-02 14:17:01 |
| gpor-20170930xex321.htm | 6950 | 2017-11-02 14:17:01 |
| gpor-20170930xex322.htm | 6907 | 2017-11-02 14:17:01 |
| gpor-20170930_cal.xml | 101351 | 2017-11-02 14:17:01 |
| gpor-20170930_def.xml | 366048 | 2017-11-02 14:17:01 |
| gpor-20170930_lab.xml | 797929 | 2017-11-02 14:17:01 |
| gpor-20170930_pre.xml | 544573 | 2017-11-02 14:17:01 |
| R1.htm | 20422 | 2017-11-02 14:17:01 |
| R10.htm | 47278 | 2017-11-02 14:17:01 |
| R11.htm | 131098 | 2017-11-02 14:17:01 |
| R12.htm | 7648 | 2017-11-02 14:17:01 |
| R13.htm | 48652 | 2017-11-02 14:17:01 |
| R14.htm | 7064 | 2017-11-02 14:17:01 |
| R15.htm | 18757 | 2017-11-02 14:17:01 |
| R16.htm | 75763 | 2017-11-02 14:17:01 |
| R17.htm | 46398 | 2017-11-02 14:17:01 |
| R18.htm | 113089 | 2017-11-02 14:17:01 |
| R19.htm | 39049 | 2017-11-02 14:17:01 |
| R2.htm | 97046 | 2017-11-02 14:17:01 |
| R20.htm | 6751 | 2017-11-02 14:17:01 |
| R21.htm | 933192 | 2017-11-02 14:17:01 |
| R22.htm | 20155 | 2017-11-02 14:17:01 |
| R23.htm | 7266 | 2017-11-02 14:17:01 |
| R24.htm | 24066 | 2017-11-02 14:17:01 |
| R25.htm | 53480 | 2017-11-02 14:17:01 |
| R26.htm | 46532 | 2017-11-02 14:17:01 |
| R27.htm | 111051 | 2017-11-02 14:17:01 |
| R28.htm | 51496 | 2017-11-02 14:17:01 |
| R29.htm | 15603 | 2017-11-02 14:17:01 |
| R3.htm | 26197 | 2017-11-02 14:17:01 |
| R30.htm | 75318 | 2017-11-02 14:17:01 |
| R31.htm | 41143 | 2017-11-02 14:17:01 |
| R32.htm | 145352 | 2017-11-02 14:17:01 |
| R33.htm | 31404 | 2017-11-02 14:17:01 |
| R34.htm | 932643 | 2017-11-02 14:17:01 |
| R35.htm | 31906 | 2017-11-02 14:17:01 |
| R36.htm | 20645 | 2017-11-02 14:17:01 |
| R37.htm | 15259 | 2017-11-02 14:17:01 |
| R38.htm | 17990 | 2017-11-02 14:17:01 |
| R39.htm | 20503 | 2017-11-02 14:17:01 |
| R4.htm | 75517 | 2017-11-02 14:17:01 |
| R40.htm | 19060 | 2017-11-02 14:17:01 |
| R41.htm | 17416 | 2017-11-02 14:17:01 |
| R42.htm | 54882 | 2017-11-02 14:17:01 |
| R43.htm | 15257 | 2017-11-02 14:17:01 |
| R44.htm | 8511 | 2017-11-02 14:17:01 |
| R45.htm | 134799 | 2017-11-02 14:17:01 |
| R46.htm | 42165 | 2017-11-02 14:17:01 |
| R47.htm | 175608 | 2017-11-02 14:17:01 |
| R48.htm | 22279 | 2017-11-02 14:17:01 |
| R49.htm | 12518 | 2017-11-02 14:17:01 |
| R5.htm | 16975 | 2017-11-02 14:17:01 |
| R50.htm | 25245 | 2017-11-02 14:17:01 |
| R51.htm | 28754 | 2017-11-02 14:17:01 |
| R52.htm | 40537 | 2017-11-02 14:17:01 |
| R53.htm | 9065 | 2017-11-02 14:17:01 |
| R54.htm | 30896 | 2017-11-02 14:17:01 |
| R55.htm | 9205 | 2017-11-02 14:17:01 |
| R56.htm | 14083 | 2017-11-02 14:17:01 |
| R57.htm | 40593 | 2017-11-02 14:17:01 |
| R58.htm | 16197 | 2017-11-02 14:17:01 |
| R59.htm | 11787 | 2017-11-02 14:17:01 |
| R6.htm | 44588 | 2017-11-02 14:17:01 |
| R60.htm | 19248 | 2017-11-02 14:17:01 |
| R61.htm | 28966 | 2017-11-02 14:17:01 |
| R62.htm | 17917 | 2017-11-02 14:17:01 |
| R63.htm | 16726 | 2017-11-02 14:17:01 |
| R64.htm | 174630 | 2017-11-02 14:17:01 |
| R65.htm | 96829 | 2017-11-02 14:17:01 |
| R66.htm | 31974 | 2017-11-02 14:17:01 |
| R67.htm | 33207 | 2017-11-02 14:17:01 |
| R68.htm | 17759 | 2017-11-02 14:17:01 |
| R7.htm | 103981 | 2017-11-02 14:17:01 |
| R8.htm | 6428 | 2017-11-02 14:17:01 |
| R9.htm | 57040 | 2017-11-02 14:17:01 |
| report.css | 2767 | 2017-11-02 14:17:01 |
| Show.js | 1410 | 2017-11-02 14:17:01 |