| 3610 | Garment racks, metal, manufacturing | |
| 3610 | Garment racks, wood, manufacturing | |
| 5260 | Garment repair | |
| 1721 | Garment storage bags, manufacturing | |
| 1810 | Garments, oiling (i.e., waterproofing) | |
| 1429 | Garnet mining | |
| 2926 | Garnetting machines, textile, manufacturing | |
| 3720 | Garnetting of textile waste and rags | |
| 1810 | Garter belts, cut and sewn from purchased fabric | |
| 1810 | Garters, women's, misses' and girls', cut and sewn from purchased fabric | |
| 4520 | Gas (natural) compressing station construction, general contractors | |
| 1110 | Gas (natural) production | |
| 3313 | Gas analyzers, industrial process type, manufacturing | |
| 3312 | Gas analyzers, laboratory type, manufacturing | |
| 3313 | Gas and liquid analysis instruments, industrial process type, manufacturing | |
| 5143 | Gas and oil heating equipment, wholesale | |
| 4520 | Gas and oil pumping (transmission) stations, construction | |
| 6599 | Gas and oil royalty dealers | |
| 4020 | Gas and other services combined (gas less than 95% of total) | |
| 3311 | Gas apparatus, dental, manufacturing | |
| 5260 | Gas appliance repair service | |
| 5139 | Gas appliances and supplies, wholesale | |
| 2930 | Gas barbecues, manufacturing | |
| 5050 | Gas bars | |
| 5050 | Gas bars, retail | |
| 3312 | Gas burner automatic controls (except valves), manufacturing | |
| 2930 | Gas burners, heating, manufacturing | |
| 3311 | Gas capes (cold climate individual protective covers), manufacturing | |
| 3313 | Gas chromatographic instruments, industrial process type, manufacturing | |
| 3312 | Gas chromatographic instruments, laboratory type, manufacturing | |
| 1120 | Gas compressing (natural gas) at the fields, on a contract basis | |
| 5150 | Gas detecting equipment and supplies, wholesale | |
| 4020 | Gas distribution, natural or manufactured, to consumers | |
| 2930 | Gas fireplaces, manufacturing | |
| 4530 | Gas fitting contractor | |
| 3313 | Gas flow instrumentation, industrial process type, manufacturing | |
| 2919 | Gas generating machinery, general purpose type, manufacturing | |
| 5233 | Gas household appliance stores, retail | |
| 5233 | Gas household appliances, retail | |
| 5139 | Gas household appliances, wholesale | |