$GPOR 424B5 SEC Filings

Filed On	Filing
19 Dec 2016	FINAL PROSPECTUS SUPPLEMENT
15 Dec 2016	424B5
11 Mar 2016	424B5
09 Mar 2016	PRELIMINARY PROSPECTUS SUPPLEMENT
11 Jun 2015	FINAL PROSPECTUS SUPPLEMENT
09 Jun 2015	PRELIMINARY PROSPECTUS SUPPLEMENT
20 Apr 2015	FINAL PROSPECTUS SUPPLEMENT
15 Apr 2015	FILED PURSUANT TO RULE 424(B)(5)
08 Nov 2013	424B5
06 Nov 2013	424B5
12 Feb 2013	424B5
11 Feb 2013	424B5
20 Dec 2012	424B5
18 Dec 2012	PRELIMINARY PROSPECTUS SUPPLEMENT
30 Nov 2011	FINAL PROSPECTUS SUPPLEMENT
29 Nov 2011	PROSPECTUS SUPPLEMENT
12 Jul 2011	FINAL PROSPECTUS SUPPLEMENT
11 Jul 2011	PRELIMINARY PROSPECTUS SUPPLEMENT
28 Mar 2011	424B5
21 Mar 2011	PROSPECTUS SUPPLEMENT