GiGL's development and work is guided and supported by the GiGL Steering Group. 

• Ecology Consultancy Ltd
• Environment Agency
• Greater London Authority
  
• London Bat Group
• London Biodiversity Partnership
• London Borough Wandsworth (Chair) / London Boroughs Biodiversity Forum
  
• London Natural History Society
• London Parks and Green Spaces Forum
• London Wildlife Trust
• Natural England
• Natural History Museum