| G S Fire Technology INC | Miguel Mendoza-Pineda | — | (760) 241 3683 | Electricians | Victorville · San Bernardino County | — | — |
| G S L Industries INC DBA G & L Cabinets | George Victor Fuston | — | (909) 214 0281 | Other | Ontario · San Bernardino County | — | — |
| G S R Construction Company | George Scott Robles | — | (951) 479 6963 | GC, remodel, ADU | Oak Hills · San Bernardino County | — | — |
| G Shuey Construction | Gary Dean Shuey | — | (909) 226 2745 | GC, remodel, ADU | Lake Arrowhead · San Bernardino County | — | — |
| G T Electric INC | Gabriel Manuel Rojas | — | (909) 983 6570 | Electricians | Ontario · San Bernardino County | — | — |
| G T Roofing & Repair INC | Cristopher Daniel Ticas Rivera | — | (760) 620 8881 | Other roofers | Victorville · San Bernardino County | — | — |
| G V C O Construction INC | Coyt Gloria | — | (909) 912 5300 | Other | Ontario · San Bernardino County | — | — |
| G W Construction | Garrett Manley Winstead | — | (909) 368 8343 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| G W P | G W P | — | (909) 917 6244 | Other | Chino Hills · San Bernardino County | — | — |
| G W Retail Renewal And Installations | Justin Michael Warren | — | (909) 806 9121 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| G&c General Construction | Gabino Esparza Carrillo | gcgeneralconstructionllc@gmail.com | (760) 412 0687 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| G&g Grading And Excavation INC | Hector Galvan | — | (760) 261 8935 | Other | Victorville · San Bernardino County | — | — |
| G's United Concrete | G's United Concrete | — | (760) 261 2330 | Other | Victorville · San Bernardino County | — | — |
| Gabe Lopez Grading | Gabe Lopez Grading | — | (760) 684 9512 | Other | Hesperia · San Bernardino County | — | — |
| Gabe's General Construction | Hernandez Sanchez Gabriel | — | (909) 437 6939 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Gabriel Ayala | Gabriel Ayala | — | (909) 851 9121 | Other | Alta Loma · San Bernardino County | — | — |
| Gabriel Huete | Gabriel Huete | — | (760) 900 2370 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Gabriel Ortiz | Gabriel Ortiz | — | (909) 260 9851 | Other | Ontario · San Bernardino County | — | — |
| Gabriel Velazquez | Gabriel Velazquez | — | (626) 216 1323 | Other | Fontana · San Bernardino County | — | — |
| Gabriel's Garage Doors | Juan Gabriel Orellana Ramirez | — | (818) 836 4011 | Other | Fontana · San Bernardino County | — | — |
| Gaby's Construction | Flores Ernesto | — | (909) 265 5799 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Gac Construction INC | George Charles Iii Ash | — | (909) 728 8172 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Gaddies Construction | Bradley Jay Gaddie | — | (909) 663 7900 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| Gafe General Construction INC | Helguera Gabriel Chairez | — | (909) 222 2842 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Gal - Espi Construction INC | Patricio Galvan | — | (909) 762 6152 | GC, remodel, ADU | Bloomington · San Bernardino County | — | — |
| Galaxy Restoration Concrete | Efrain Villareal | — | (951) 288 8715 | Restoration | Fontana · San Bernardino County | — | — |
| Galaxy Unlimited | Galaxy Unlimited | — | (408) 318 2730 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Galland Electric INC | Travis Wayne Freitas | — | (760) 646 0379 | Electricians | Hesperia · San Bernardino County | — | — |
| Gallardo Constructors | Gallardo Constructors | — | (562) 715 1940 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Gallardo Painting INC | Juan Salvador Sr Gallardo Medina | — | (760) 987 8040 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Gallery Shutters INC | Timothy Allen Mc Nulty | — | (800) 462 8777 | Other | San Bernardino · San Bernardino County | — | — |
| Galvanco Builders | Galvanco Builders | — | (909) 358 1913 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Gama's Iron Works | Gama's Iron Works | — | (909) 631 8536 | Other | Chino Hills · San Bernardino County | — | — |
| Game Time Tech Installers | Aeron Norberto White | — | (626) 977 4139 | Electricians | Chino · San Bernardino County | — | — |
| Gami Construction INC DBA G & G Trucking | Jose Israel Gutierrez | — | (909) 873 3149 | Other | Bloomington · San Bernardino County | — | — |
| Gamma Electrical Company | Marco Antonio Jr Quintero | — | (909) 819 8306 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Gandarilla Refrigeration & HVAC | Juan Raymundo Gandarilla-carrillo | — | (760) 503 9354 | HVAC | Apple Valley · San Bernardino County | — | — |
| Gang Wang | Gang Wang | — | (626) 993 0915 | Electricians | Chino Hills · San Bernardino County | — | — |
| Gao Ping | Gao Ping | — | (909) 266 3502 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Gap Pro Painting INC | Geovanny Dagoberto Pedroza Pedroza | — | (408) 466 0009 | Windows, patio, painters | Sugarloaf · San Bernardino County | — | — |