| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| GPX | Senior Vice President | Nov 04, 2014 | Option Exercise | $32.74 | 377 | 12,343 | 10,244 | Nov 06, 2014, 04:22 PM |
| GPX | Senior Vice President | Sep 30, 2014 | Option Exercise | $29.00 | 3,500 | 101,500 | 10,621 | Oct 02, 2014, 05:17 PM |
| GPX | Senior Vice President | Sep 12, 2014 | Option Exercise | $27.52 | 3,660 | 100,723 | 14,121 | Sep 16, 2014, 04:19 PM |
| GPX | Senior Vice President | Sep 12, 2014 | Option Exercise | $7.27 | 6,000 | 43,620 | 17,781 | Sep 16, 2014, 04:19 PM |
| GPX | Senior Vice President | Aug 06, 2014 | Option Exercise | $25.27 | 1,034 | 26,129 | 11,781 | Aug 08, 2014, 04:04 PM |
| GPX | Senior Vice President | Dec 23, 2013 | Sale | $29.00 | 1,276 | 37,004 | 12,815 | Dec 26, 2013, 04:04 PM |
| GPX | Senior Vice President | Aug 06, 2013 | Option Exercise | $24.56 | 924 | 22,693 | 10,076 | Aug 08, 2013, 11:37 AM |
| GPX | Senior Vice President | Nov 14, 2012 | Sale | $20.70 | 800 | 16,560 | 11,000 | Nov 16, 2012, 10:24 AM |
| GPX | Senior Vice President | Nov 07, 2012 | Option Exercise | $20.47 | 866 | 17,727 | 11,800 | Nov 09, 2012, 03:30 PM |
| GPX | Senior Vice President | Aug 15, 2012 | Sale | $19.60 | 1,890 | 37,044 | 12,666 | Aug 17, 2012, 04:18 PM |
| GPX | Senior Vice President | Aug 06, 2012 | Option Exercise | $19.38 | 7,110 | 137,792 | 14,556 | Aug 08, 2012, 04:12 PM |
| GPX | Senior Vice President | Aug 06, 2012 | Option Exercise | $11.08 | 9,000 | 99,720 | 21,666 | Aug 08, 2012, 04:12 PM |
| GPX | Senior Vice President | Jun 29, 2012 | Sale | $17.80 | 6,734 | 119,865 | 1,666 | Jul 03, 2012, 02:12 PM |
| GPX | Senior Vice President | Mar 29, 2012 | Option Exercise | $17.95 | 20,266 | 363,775 | 8,400 | Apr 02, 2012, 02:40 PM |
| GPX | Senior Vice President | Mar 29, 2012 | Option Exercise | $10.23 | 27,000 | 276,300 | 22,666 | Apr 02, 2012, 02:40 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| GPX | Senior Vice President | Nov 04, 2014 | Option Exercise | 12,343 |
| GPX | Senior Vice President | Sep 30, 2014 | Option Exercise | 101,500 |
| GPX | Senior Vice President | Sep 12, 2014 | Option Exercise | 100,723 |
| GPX | Senior Vice President | Sep 12, 2014 | Option Exercise | 43,620 |
| GPX | Senior Vice President | Aug 06, 2014 | Option Exercise | 26,129 |
| GPX | Senior Vice President | Dec 23, 2013 | Sale | 37,004 |
| GPX | Senior Vice President | Aug 06, 2013 | Option Exercise | 22,693 |
| GPX | Senior Vice President | Nov 14, 2012 | Sale | 16,560 |
| GPX | Senior Vice President | Nov 07, 2012 | Option Exercise | 17,727 |
| GPX | Senior Vice President | Aug 15, 2012 | Sale | 37,044 |
| GPX | Senior Vice President | Aug 06, 2012 | Option Exercise | 137,792 |
| GPX | Senior Vice President | Aug 06, 2012 | Option Exercise | 99,720 |
| GPX | Senior Vice President | Jun 29, 2012 | Sale | 119,865 |
| GPX | Senior Vice President | Mar 29, 2012 | Option Exercise | 363,775 |
| GPX | Senior Vice President | Mar 29, 2012 | Option Exercise | 276,300 |