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| GRUNNLINK AS | 827469262 | FARSUND |
| GRUNNMUR AS | 990097305 | OSLO |
| GRUNNMURSPESIALISTEN AS | 989877801 | HAMAR |
| GRUNNPARTNER AS | 913868188 | OVERHALLA |
| GRUNN-SERVICE AS | 936131425 | TIME |
| GRUNN SOLID AS | 927151448 | KRISTIANSAND |
| GRUNNTEKNIKK AS | 925362441 | SANDEFJORD |
| GRUNNTEKNIKK MILJØ AS | 918283625 | NITTEDAL |
| GRYTHE MASKIN AS | 821127572 | HOLMESTRAND |
| GS ARKITEKTER AS | 916173075 | BÆRUM |
| G. S. BYGG AS | 990336857 | DRAMMEN |
| GS BYGG OG ANLEGG AS | 917636850 | HOLMESTRAND |
| GS BYGGTECH AS | 916642741 | MIDT-TELEMARK |
| GS-DRIFT AS | 912420493 | HJELMELAND |
| GS MASKIN AS | 918912320 | DRANGEDAL |
| GS-MASKIN AS | 990555125 | KINN |
| GS STÅLBYGG AS | 929359658 | PORSGRUNN |
| GST BYGGMONTERING AS | 823672462 | ASKER |
| G-TAKK AS | 826091312 | FARSUND |
| G.T AUTOMASJON&ELEKTRO SERVICE AS | 914719313 | GRIMSTAD |
| GT-BYGG AS | 995079917 | NOTODDEN |
| GTI KARMØY AS | 913716361 | KARMØY |
| GT MUR & FLIS AS | 914154677 | FREDRIKSTAD |
| GTS AS | 991238034 | HOL |
| GUDMUNDSVEEN AS | 998303036 | VESTRE TOTEN |
| GUDØY GRAVESERVICE AS | 925263443 | RÅDE |
| GUERICKE ENGINEERING AS | 917411492 | FÆRDER |
| GULBRANDSEN BYGG | 999639623 | FREDRIKSTAD |
| GULBRANDSEN & OLIMB AS | 879296242 | OSLO |
| GULCON AS | 922128693 | ASKER |
| GULEN BLIKK OG VEDLIKEHOLD AS | 922347883 | GULEN |
| GULLHAGEN ANLEGGSDRIFT AS | 988415472 | ÅL |
| GULLICHSEN AS | 925884359 | ENEBAKK |
| GULVBETONG AS | 992699612 | TRONDHEIM |
| GULVENTREPRENØREN AS | 992103930 | LILLESTRØM |
| GULV OG MAL AS | 985185042 | HEIM |
| GULV OG TAK AS | 936130364 | SANDNES |
| GUNDERSEN MASKIN | 971044519 | TROMSØ |
| GUNDERSEN MASKIN & TRANSPORT AS | 980882500 | TROMSØ |
| GUNDERSEN SVEN | 870371772 | BERGEN |
| GUNGE VVS AS | 918777520 | TROMSØ |
| GUNNAR BAKKEN | 919451890 | LARVIK |
| GUNNAR BROVIG | 959404062 | LILLESAND |
| GUNNAR DAHLE | 970295070 | TOKKE |
| GUNNAR FOSSLI | 913302060 | SANDEFJORD |
| GUNNAR HOGNERUD AS | 982894638 | HOL |
| GUNNAR JAKOBSEN AS | 998366380 | LINDESNES |
| GUNNAR KIND AS | 983762433 | OSLO |
| GUNNAR L HANSEN OG SØNN DA | 952947885 | OSLO |