| Gilbert-Landrum a Unit G-1-277086 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 0 | 1.36M | Dec 2014 – Jul 2026 |
| Schindler, Gilbert G-2-267345 | Trio Consulting & Management,llc only | Mont (Wilcox 10640) | Lavaca | 1 | 0 | 78.2K | Aug 2012 – Nov 2018 |
| Gilbert Estate G-3-61792 | Ace Productions only | Gilbert Ranch (8750) | — | 1 | 0 | 0 | Jan 1993 – Mar 1997 |
| Gilbert Estate G-3-62177 | Ace Productions only | Gilbert Ranch (8700) | — | 1 | 0 | 0 | Jan 1993 – Mar 1997 |
| Clubb et Al G-3-116192 | XTO Energy Inc. only | Gilbert Ranch (8700) | Jefferson | 1 | 0 | 2.12M | Jan 1993 – May 2010 |
| Gilbert G-3-118046 | XOG Operating LLC only | Bernard, W. (Boettcher 7380) | Wharton | 1 | 0 | 224K | Jan 1993 – May 2025 |
| Gilbert G-3-118263 | XOG Operating LLC only | Bernard, W. (Boettcher 7380) | Wharton | 1 | 0 | 89.7K | Jan 1993 – Apr 2025 |
| Gilbert G-3-118264 | GWR Operating Co. only | Bernard, W. (Boettcher 7380) | Wharton | 1 | 0 | 0 | Jan 1993 – Mar 1997 |
| Gilbert G-3-119277 | Texana Operating Company only | Bernard, W. (7850) | Wharton | 1 | 0 | 103K | Jan 1993 – Nov 1997 |
| Gilbert G-3-122296 | XOG Operating LLC only | Bernard, W. (7850) | Wharton | 1 | 0 | 0 | Jan 1993 – Apr 2025 |
| Gilbert G-3-126570 | XOG Operating LLC only | Bernard, W. (Bernard, East 2700) | Wharton | 1 | 0 | 280K | Jan 1993 – Apr 2025 |
| Crti/McCleod-Gilbert 1ST City G-3-128868 | Atco Prod. Co., Inc. only | Broussard, S. (Nodosaria 2ND) | Jefferson | 1 | 0 | 510K | Jan 1993 – Jan 2015 |
| Sneed, Gilbert G-3-131704 | Denbury Onshore, LLC only | Hastings (M- 7) | Brazoria | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Appelt Properties G-3-140297 | Ads Operating, Inc. only | Gilbert Woods (9490) | Jefferson | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| McLeod, Gilbert-1ST City G-3-156978 | Atco Prod. Co., Inc. only | Broussard, S. (Nodosaria 2ND) | Jefferson | 1 | 0 | 0 | Aug 1995 – Jan 2015 |
| Broussard G-3-185628 | Cimarex Energy Co. only | Gilbert Woods (Nod. 1) | Jefferson | 1 | 0 | 512K | Aug 2001 – Apr 2011 |
| Gilbert Unit G-3-196149 | Weiser-Brown Operating Company only | Wharton, West (5580) | Wharton | 1 | 0 | 17.2K | May 2003 – Dec 2003 |
| Elizabeth G-3-198077 | Azimuth Energy, LLC only | Gilbert Woods (Nod. 1) | Jefferson | 1 | 0 | 229K | Aug 2003 – Jan 2005 |
| Gilbert Unit G-3-198926 | Weiser-Brown Operating Company only | Wharton, W. (4510) | Wharton | 1 | 0 | 284K | Dec 2003 – Sep 2012 |
| Woods, Gilbert Unit G-3-205882 | Square Mile Energy, L.L.C. only | Gilbert Woods, N. (Nodosaria) | Jefferson | 1 | 0 | 1.05M | Nov 2004 – Jan 2007 |
| Moody-Hutchings Unit G-3-205883 | Square Mile Energy, L.L.C. only | Gilbert Ranch (Hackberry 2) | Jefferson | 1 | 0 | 629K | Nov 2004 – Apr 2007 |
| Appelt et al Unit G-3-211589 | Square Mile Energy, L.L.C. only | Gilbert Woods (9490) | Jefferson | 1 | 0 | 496K | Jan 2005 – Jun 2007 |
| Broussard, J. E. G-3-219265 | Square Mile Energy, L.L.C. only | Gilbert Ranch (Hackberry 2) | Jefferson | 1 | 0 | 898K | Jul 2006 – Apr 2009 |
| Gilbert-Freeman G-3-236240 | Sandel Operating Company only | Cypress Eagle (Wilcox) | Wharton | 1 | 0 | 2.66M | Apr 2008 – Jul 2026 |
| Gilbert-Freeman G-3-242402 | Sandel Operating Company only | Cypress Eagle (Wilcox) | Wharton | 1 | 0 | 8.23M | Aug 2008 – Jul 2026 |
| Gilbert-Freeman G-3-244594 | Sandel Operating Company only | Cypress Eagle (Wilcox) | Wharton | 1 | 0 | 810K | Sep 2008 – Jul 2026 |
| Gilbert-Freeman Unit G-3-263493 | Sandel Operating Company only | Cypress Eagle (Wilcox) | Wharton | 1 | 0 | 2.17M | Oct 2011 – Jul 2026 |
| Kerlin, Gilbert, et al -A- G-4-12410 | Western Gulf Oil & Gas, LLC only | Padre Island (6000) | Cameron | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Kerlin, Gilbert, et al -A- G-4-12411 | Western Gulf Oil & Gas, LLC only | Padre Island (6500) | Cameron | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Kerlin, Gilbert G-4-105409 | World Hydrocarbon, Inc. only | Padre Island (6250) | Cameron | 1 | 0 | 0 | Jan 1993 – Aug 1994 |
| Kerlin, Gilbert G-4-105410 | World Hydrocarbon, Inc. only | Padre Island (6300) | Cameron | 1 | 0 | 0 | Jan 1993 – Aug 1994 |
| Kerlin, Gilbert "A" G-4-130961 | Western Gulf Oil & Gas, LLC only | Padre Island (6300) | Cameron | 1 | 0 | 605K | Jan 1993 – Feb 2003 |
| Kerlin, Gilbert G-4-150588 | Western Gulf Oil & Gas, LLC only | Padre Island (6000) | Cameron | 1 | 0 | 885K | Jul 1994 – Dec 2012 |
| Kerlin, Gilbert A G-4-193261 | Western Gulf Oil & Gas, LLC only | Padre Island (6000) | Cameron | 1 | 0 | 104K | Feb 2003 – Dec 2012 |
| Guerra, Gilberto "A" G-4-204732 | EOG Resources, Inc. only | Tiffany (Wilcox Carrizo) | Webb | 1 | 0 | 0 | Oct 2004 – Jan 2006 |
| Guerra, Gilberto G-4-205926 | Varas Energy Operating Company, only | Tiffany (Wilcox Carrizo) | Webb | 1 | 0 | 740K | Sep 2004 – Jul 2026 |
| Ramirez, Gilberto G-4-208847 | Pheffer Oil, L.L.C. only | Jones (4200 Jackson, N.) | Jim Hogg | 1 | 0 | 21.8K | Feb 2005 – May 2021 |
| Everett, Gilbert Jr G-4-226379 | El Paso E & P Company, L. P. only | Wildcat | Duval | 1 | 0 | 0 | May 2005 – May 2007 |
| Gilbert, Alice G-6-138180 | C. W. Resources, Inc. only | Loretta Rose (Rodessa) | Smith | 1 | 0 | 3.19M | Jan 1993 – Nov 2014 |
| Gilbert, Loy G-6-138408 | C. W. Resources, Inc. only | Black Fork Creek (Rodessa) | Smith | 1 | 0 | 1.34M | Jan 1993 – Jul 2023 |
| Gilbert, Loy G-6-138409 | C. W. Resources, Inc. only | Black Fork Creek (Travis Peak) | Smith | 1 | 0 | 8.57M | Jan 1993 – Jul 2023 |
| Gilbert, Loy G-6-140092 | J-W Operating Co. only | Black Fork Creek (Pettit) | Smith | 1 | 0 | 0 | Jan 1993 – Feb 1993 |
| Gilbert Wheeler Gas Unit G-6-260400 | Sheridan Production Co III, LLC only | Carthage (Haynesville Shale) | Shelby | 1 | 0 | 2.08M | Dec 2010 – Jul 2026 |
| Gilbert Unit G-8-17388 | Itx Corporation only | Brazos, East (Caddo) | — | 1 | 0 | 682K | Jan 1993 – Jul 2026 |
| Gilbert -a- Unit G-8-17389 | Itx Corporation only | Brazos, East (Caddo) | — | 1 | 0 | 465K | Jan 1993 – Jul 2026 |
| Gilbert G-8-54263 | Giant NRG Co., LP only | Santo, N. (Bend Congl.) | — | 1 | 0 | 38.7K | Jan 1993 – May 2014 |
| Gilbert G-8-54271 | Giant NRG Co., LP only | Santo, N. (Bend Congl.) | — | 1 | 0 | 47.4K | Jan 1993 – Jun 2014 |
| Gilbert,a.b. Unit 1 G-8-60459 | Brazos Operating LLC only | Brazos, East (Caddo) | — | 1 | 0 | 30.4K | Jan 1993 – Jul 2026 |
| Gilbert,a.b. Unit 1 G-8-60460 | Brazos Operating LLC only | Brazos, East (Caddo) | — | 1 | 0 | 10.1K | Jan 1993 – Jul 2026 |
| Gilbert-Landrum B Unit G-1-276726 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 0 | 1.07M | Dec 2014 – Jul 2026 |