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| Galeria (f) / Tribuna (f) | Empore (f) | Gallery | Galerie (f) / Tribune (f) | Cantoria (f) / Ballatoio | |
| Galería (f) | Galerie (f) | Gallery | Galerie (f) | Galleria | |
| Gancho de detención (m) | Fanghaken (m) | Safety catch / hook | Crochet obturateur (m) | Gancio di arresto | |
| Gancho de escalera (m) | Leiterhaken (m) / Dachhaken (m) / Sicherheits-Haken (m) | Ladder hook / Staple hook | Crochet échelle (m) / Crochet escabeau (m) | Gancio per scale (m) | Gancho de escada (m) |
| Garganta (f) / Cuello (m) | Kehle (f) | Valley / Hollow moulding / Cove | Gorge (f) | Gola / Scanalatura | |
| Garrapata de madera (f) | Holzbock (m) | Wood tick | Tique des bois (f) | Zecca del legno (f) | |
| Gas (m) | Gas (nt) | Gas | Gaz (m) | Gas (m) | |
| Gaseado (m) | Begasung (f) | Fumigation | Désinfection au gaz (f) | Trattamento con camera a gas (m) | |
| Gases comprimidos (m.pl) | komprimierte Gase (pl) | Compressed gases (pl) | Gaz comprimés (m) | Gas compressi | |
| Gases de escape (m.pl) | Abgase (nt.pl) | Fumes | Gaz d'échappement (m) | Gas di scarico (m) | |
| Gases raros (m.pl) | Edelgase (nt.pl) | Noble gases (pl) | Gaz rares (m.pl) | Gas nobili (m.pl) | |
| Gasolina (f) | Benzin (nt) | Gasoline / Petrol | Essence (f) | Benzina (f) | |
| Gavión / Canasta de piedras (f) | Gabione (f) / Steinkorb (m) / Schüttkorb (m) / Mauersteinkorb (m) | Gabion / Stone cage | Gabion (m) / Canasta de piedras (f) | Gabbione / Cestino di pietra | |
| Geison (f) | Corona / Geison (f) | Geison / Cornice | Geison (f) | Geison (f) | |
| Generador (m) | Generator (m) | Generator | Génératrice (f) / Générateur (m) | Generatore (m) | |
| Glorieta (f) / Pérgola (f) | Laube (f) | Pergola / Bower / Arbour | Pergola (f) / Tonnelle (f) / Portique (m) | Pergola (f) | Pérgola (f) / Pérgula (f) |
| Gota de goteo (f) | Wetterschenkel (m) / Wasserschenkel (m) | Weather bead / Drip bead | Montant d'eau (m) / Perle d'égouttage (f) | Gambe dell'acqua / Perlina gocciolante | |
| Gradación (f) | Abstufung (f) | Shade | Dégradé (m) | Gradazione (f) | |
| Grado (m) | Grad (m) | Degree | Degré (m) | Grado (m) | |
| Grado de humedad (m) | Feuchtigkeitsgehalt (m) | Moisture content | Teneur en humidité (f) | Umidità nell'aria (f) | |
| Guantelete | Gutta (f) (Guttae) | Guttae | Guttae (f.pl) | Guttae | |
| Guantes (m.pl) / Manoplas (f.pl) | Handschuhe (m.pl) | Gloves | Gants (m.pl) / Mitaines (f.pl) | Guanti (m.pl) | |
| Gótico (m) | Gothik (f) / Gotische Architektur (f) | Gothic | Gothique (m) | Gotico (m) | |
| gasear | begasen (v) | fumigate | gazer | trattare con gas (tarli) | |
| grabar al aqua fuerte | ätzen (v) | etch | graver à l'eau forte | incidere | |
| grande | gross / groß (adj) | large / big | grand | grande | |