| Gto Electric LLC | Jose Luis Marquez Luva | — | (909) 723 7665 | Electricians | Menifee · Riverside County | — | — |
| Gto Tileworks | Gto Tileworks | — | (951) 505 4501 | Other | Moreno Valley · Riverside County | — | — |
| Gtz Paint | Gtz Paint | — | (714) 606 2358 | Windows, patio, painters | Corona · Riverside County | — | — |
| Guadalupe Morales | Guadalupe Morales | — | (951) 425 7794 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Guadalupe Valdes Gamboa | Guadalupe Valdes Gamboa | — | (760) 673 4770 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Guangjin Construction INC | Cheng Qian | — | (626) 382 9670 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| Guaranteed Plumbing | Guaranteed Plumbing | — | (760) 250 4548 | Other | Indio · Riverside County | — | — |
| Guaranteed Quality Construction | Eric Ronald Green | — | (951) 640 7658 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Guardian Plumbers Heating Air & Electrical | Matthew Jay Black | — | (951) 216 3280 | HVAC | Wildomar · Riverside County | — | — |
| Guardian Power Protection Services INC | Joseph Arthur Nordlund | — | (951) 304 4455 | Electricians | Temecula · Riverside County | — | — |
| Guerrero Roofing | Eddie Heriberto Guerrero | — | (951) 640 1122 | Other roofers | Perris · Riverside County | — | — |
| Guillen Painting | Guillen Painting | jesus@guillenpainting.com | (951) 609 6060 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Guillen's Plumbing & Drain Specialist | Guillen's Plumbing & Drain Specialist | — | (951) 529 1826 | Other | Riverside · Riverside County | — | — |
| Guillermo Arrieta | Guillermo Arrieta | — | (760) 567 5540 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Guillermo Landeros | Guillermo Landeros | — | (760) 791 1080 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Guillermo Perez Construction | Guillermo Jesus Perez | — | (951) 906 8051 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Guillermo Rios | Guillermo Rios | — | (951) 531 7690 | Other | Moreno Valley · Riverside County | — | — |
| Guillermo Ulloa Jr | Guillermo Ulloa Jr | — | (760) 409 1062 | Electricians | Cathedral City · Riverside County | — | — |
| Gumm Flooring | Gumm Flooring | — | (951) 925 8943 | Other | Hemet · Riverside County | — | — |
| Gunco Steel INC | Joshua Jacob Lucero | — | (909) 709 9968 | Other | Calimesa · Riverside County | — | — |
| Gunner Caulking & Sealants | Piceno Gonzalo Villanueva | — | (951) 234 6887 | Other | Canyon Lake · Riverside County | — | — |
| Gunnys Heating And Air | Alejandro Lopez | — | (602) 321 8735 | HVAC | Perris · Riverside County | — | — |
| Gunther Machnik | Gunther Machnik | — | (760) 341 8523 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Gurrola Plumbing | Gurrola Plumbing | — | (909) 437 1890 | Other | San Jacinto · Riverside County | — | — |
| Gurrola Roofing INC | Felix John Gurrola | — | (951) 842 9807 | Other roofers | Moreno Valley · Riverside County | — | — |
| Gus Landscape Contractors INC | Gustavo Jr Diaz | — | (760) 808 1285 | Windows, patio, painters | Palm Springs · Riverside County | — | — |
| Gusr | Rivera Gustavo | — | (951) 598 4464 | Other | Riverside · Riverside County | — | — |
| Gussie Steel INC | Stefan Richard Davies | — | (909) 437 0562 | Other | Murrieta · Riverside County | — | — |
| Gustafson Construction INC | Timothy Daniel Gustafson | — | (760) 340 3462 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Gustavo Alvarez | Gustavo Alvarez | — | (951) 545 8371 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| Gustavo Araujo | Gustavo Araujo | — | (951) 208 9721 | Other | Hemet · Riverside County | — | — |
| Gustavo Carrillo | Gustavo Carrillo | — | (951) 287 1220 | Other | Perris · Riverside County | — | — |
| Gustavo Diaz Jr DBA Gus Landscape Contractors | Gustavo Jr Diaz | — | (760) 808 1285 | Windows, patio, painters | Palm Springs · Riverside County | — | — |
| Guti Construction | Raquel Gutierrez | — | (951) 217 5438 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Gutierrez Landscape | Gutierrez Landscape | — | (951) 377 9307 | Windows, patio, painters | Norco · Riverside County | — | — |
| Gutierrez Landscape And Maintenance | Gutierrez Landscape And Maintenance | — | (714) 231 1241 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Gutierrez Landscaping A Partnership | Felipe Gutierrez Benitez | — | (714) 651 9235 | Windows, patio, painters | Norco · Riverside County | — | — |
| Gutierrez Plumbing INC | Adrian Gutierrez | — | (760) 601 4842 | Other | Cathedral City · Riverside County | — | — |
| Gutierrez Quality Concrete INC | Apolonio Gutierrez | — | (909) 846 6778 | Other | Menifee · Riverside County | — | — |
| Gutierrez Quick Response Heating & Air Conditioning | Carlos Osbaldo Gutierrez | — | (951) 455 1043 | HVAC | Moreno Valley · Riverside County | — | — |