| Gibson Construction | George Moss Jr Gibson | — | (909) 816 7631 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Gig Signs | Gig Signs | — | (866) 827 7446 | Other | Rialto · San Bernardino County | — | — |
| Gilbert Acuna Plumbing | Gilbert Acuna Plumbing | — | (909) 648 2893 | Other | Crestline · San Bernardino County | — | — |
| Gilbert Castillo | Gilbert Castillo | — | (760) 963 5000 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Giles Construction | Sean Michael Giles | — | (760) 885 7067 | HVAC | Lucerne Valley · San Bernardino County | — | — |
| Gill Construction | John Henry Ii Gill | — | (909) 382 1771 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Gilley's Construction | Fernandez Gilbert | — | (760) 881 9049 | GC, remodel, ADU | Oak Hills · San Bernardino County | — | — |
| Gilligan Construction Company | Brian James Gilligan | — | (909) 557 5430 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Gilmore Plumbing | Gilmore Plumbing | — | (909) 352 9427 | Other | San Bernardino · San Bernardino County | — | — |
| Gima Construction | Manuel Hernandez-Vargas | mh@gimaconstruction.com | (909) 609 8235 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Gina's Electrical Service | Gina Ann Orban | — | (714) 306 8006 | Electricians | Yucca Valley · San Bernardino County | — | — |
| Gingerich Construction | Michael Wayne Gingerich | — | (310) 422 8684 | GC, remodel, ADU | Big Bear City · San Bernardino County | — | — |
| Giselle Ramiro Hoehn | Giselle Ramiro Hoehn | — | (714) 244 2979 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Giuseppe Pescetti | Giuseppe Pescetti | — | (310) 704 3108 | GC, remodel, ADU | Twentynine Palms · San Bernardino County | — | — |
| Gjk Construction Concrete Specialist | Herrera Jorge Garcia | — | (909) 342 8574 | Other | Ontario · San Bernardino County | — | — |
| Gl Electric | Madera Felipe | — | (840) 250 1708 | Electricians | Fontana · San Bernardino County | — | — |
| Glasshopper Mobile Glass INC | Charles Joseph Digati | — | (909) 630 4322 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| Glasshouse Construction LLC | Jedidiah Forast Ritchea | — | (909) 801 0812 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Glassit INC | Michael Pedraza | — | (909) 456 5576 | Windows, patio, painters | Montclair · San Bernardino County | — | — |
| Gleason Power Services | Johnny Kay Gleason | — | (909) 579 9063 | Electricians | Fontana · San Bernardino County | — | — |
| Glen Davis Sandberg | Glen Davis Sandberg | — | (619) 972 7975 | GC, remodel, ADU | Twentynine Palms · San Bernardino County | — | — |
| Glenn Kraus Fabrication | Glenn Kraus Fabrication | — | (909) 391 2127 | Other | Ontario · San Bernardino County | — | — |
| Glenn Larsen Construction | Glenn Alan Larsen | — | (760) 605 6493 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Glenn Yarber Electrical & General Contractor | Glenn James Yarber | — | (909) 801 9057 | Electricians | Big Bear City · San Bernardino County | — | — |
| Global Automation Services INC | Todd Poe Courtney | — | (909) 790 8100 | Other | Yucaipa · San Bernardino County | — | — |
| Global Roofing | Eder Yair Martinez Palma | interested@domainmarket.com | (909) 521 6046 | Other roofers | San Bernardino · San Bernardino County | — | — |
| Globaltech INC | Benjamin Adam Arias | — | (949) 828 5656 | HVAC | Chino Hills · San Bernardino County | — | — |
| Glover Plumbing Solutions INC | Ryan Jeffrey Glover | — | (424) 436 2978 | Other | Chino Hills · San Bernardino County | — | — |
| Gm Custom Painting INC | Guillermo Jr Muniz | — | (909) 990 0062 | Windows, patio, painters | Bloomington · San Bernardino County | — | — |
| Gm Legacy Concrete | Magana Fernando Mendoza | office@gmlegacyconcrete.com | (760) 887 9001 | Other | Victorville · San Bernardino County | — | — |
| Gm Windows Glass & Door | Gm Windows Glass & Door | infogmwindows@gmail.com | (760) 324 3400 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Gmc General Builders INC | J Guadalupe Mercado Chavez | info@gmcgeneralbuilders.com | (562) 618 7105 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Gmg Enterprise INC | George Tim Jr Floutsis | gmgmulk@gmail.com | (626) 252 6900 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Gmg Industries LLC | Gregory Michael Gulli | — | (909) 253 9110 | GC, remodel, ADU | Big Bear City · San Bernardino County | — | — |
| Gmpi LLC | Jesus John Gonzalez | — | (951) 903 8387 | Other | Pinon Hills · San Bernardino County | — | — |
| Gna Paint Worx INC | Gustavo Eduardo Lopez | — | (323) 400 1732 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Go Painting | Go Painting | — | (626) 890 4260 | Windows, patio, painters | Rancho Cucamonga · San Bernardino County | — | — |
| Go Pro Painting INC | German Alonso Ortega | — | (909) 994 8038 | Windows, patio, painters | Upland · San Bernardino County | — | — |
| Go Professional Plumbing Services | Victor Lywellyn Nicholson | — | (909) 654 1322 | Other | Loma Linda · San Bernardino County | — | — |
| God Drywall INC | Roger Adrian Flores Damas | — | (909) 538 3571 | Other | Bloomington · San Bernardino County | — | — |