| Golf Lessons | Government Services | Game Console Repairs | Gardening |
| Glassware - Manufacturing | Glassware - Wholesale | Glassware, Cutlery & Crockery | Glaziers |
| Glazing Supplies | Global Positioning Systems | Gloves - Manufacturing | Gloves - Wholesale |
| Golf Clubs & Golf Courses | Golf Course Designers & Golf Course Consultants | Golf Course Equipment & Golf Course Supplies | Golf Driving Ranges |
| Golf Equipment & Golf Supplies | Golf Tours & Golf Promotions | Government Departments & Govt Offices | Government Departments - Agriculture & Food |
| Government Departments - Arts, Sport & Tourism | Government Departments - Civil Service Commission | Government Departments - Comms, Marine & Natural Resources | Government Departments - Community, Rural & Gaeltacht Affairs |
| Government Departments - Defence | Government Departments - Dept' of the Taoiseach | Government Departments - Education & Science | Government Departments - Energy |
| Government Departments - Enterprise, Trade & Employment | Government Departments - Environment, Heritage & Local Government | Government Departments - Equality & Law Reform | Government Departments - Finance |
| Government Departments - Foreign Affairs | Government Departments - Health & Children | Government Departments - Houses of the Oireachtas | Government Departments - Irish Aviation Authority |
| Government Departments - Justice Equality & Law Reform | Government Departments - Office of Public Works | Government Departments - Ombudsman Office of the | Government Departments - Revenue Commissioners |
| Government Departments - Seanad Eireann Offices of | Government Departments - Social & Family Affairs | Government Departments - Tanaiste Office of the | Government Departments - Transport |
| Government Departments - Transport, Energy & Communications | Government Departments - Uachtaran Na Heireann | Gowns | Graffiti Cleaning |
| Grain | Grain Driers & Crop Driers | Grain Handling Equipment | Grain Storage |
| Granite | Graphic Designers | Grave Maintenance | Grease Traps |
| Greengrocers | Greenhouses | Greeting Cards | Greeting Cards - Manufacturing |
| Greeting Cards - Wholesale | Greyhound Racing Stadiums | Greyhound Trainers | Grids |
| Grinding Service & Sharpening Service | Grinding Machinery | Grinding Wheels | Grocers |
| Grocers - Wholesale | Grouting Contractors | Guard Rails | Guest Houses |
| Guide Services | Guniting | Guns & Ammunition | Guns Wholesale & Ammunition - Wholesale |
| Gunsmiths | Gutter Cleaning | Gutters | Gymnasium Equipment |
| Gymnastic Clubs | Gypsum Products | Garages - Locality Guide | Garden Sheds & Buildings |
| Generators | Govt Dept - Agriculture, Fisheries & Food | Govt Dept - Communications Energy & Natural Resources | Govt Dept - Dept of the Taoiseach |
| Govt Dept - Education & Skills | Govt Dept - Enterprise, Trade & Innovation | Govt Dept - Environment, Heritage & Local Government | Govt Dept - Justice & Law Reform |
| Govt Dept - Social Protection | Govt Dept - Tourism, Culture & Sport | Graphic Designers - Web Guide | Green Guide - Air Tightness |
| Green Guide - Building Energy Rating | Green Guide - Construction - Renewable Energy | Green Guide - Energy Management & Conservation | Green Guide - Heat Pumps - Renewable Energy |
| Green Guide - House & Home - Renewable Energy | Green Guide - Insulation | Green Guide - Rain Water Harvesting | Green Guide - Renewable Energy Resources |
| Green Guide - Solar Energy - Electricity | Green Guide - Solar Energy - Heating | Green Guide - Stoves & Boilers - Renewable Energy | Green Guide - Waste Recycling - Composting |
| Green Guide - Wind & Water Power Equipment & Services | Green Guide - Wood Pellet Boilers | Groundwork Contractors | Galvanized Sheets |
| Galvanizing | Game Breeders | Game Dealers, Processors & Exporters | Garage Doors |
| Garage Equipment & Garage Supplies | Garage Services | Garages | Garda Siochana |
| Garden Centres | Garden Equipment - Hire | Garden Equipment & Garden Supplies | Garden Furniture |
| Garden Maintenance | Garden Sheds | Gas - Domestic | Gas - Industrial |
| Gas - Suppliers | Gas Appliances | Gas Detectors | Gas Fitters |
| Gaskets & Jointings | Gates | Gauges | Gear Boxes |
| Gear Boxes - Automatic | Gear Cutting | Gears | Genealogical Research |
| General Stores | Geologists | Gift Catalogue Schemes | Gift Services - Delivered |
| Gift Shops | Gift Shops - Suppliers | Glass | Glass - Coating & Glass Tinting |
| Glass - Manufacturing | Glass - Stained | Glass - Wholesale | Glass Fibre |
| Glasshouse Growers |