The key functions of WGGA are:
- General ‑ represent and promote the common national interests of Australian winegrape growers, deliver direct benefits to members, improve the profitability and sustainability of Australian winegrape growers
- Effective advocacy – undertake government and industry advocacy on behalf of winegrape growers in key policy areas including; biosecurity, market access for winegrapes, inter-jurisdictional standards and protocols, tax, national water arrangements, the environment and industrial relations.
- Biosecurity and vine health ‑ fulfill the wine sector’s obligations to the Emergency Plant Pest Response Deed and facilitate industry’s national biosecurity management arrangements.
- Market access for winegrapes ‑ develop and maintain industry standards and codes of conduct for the sale and purchase of winegrapes and the negotiation and administration of contracts, negotiate limits to residues in wine from vineyard practices, facilitate objective measurement of winegrape characteristics and the regulation of trade measures, and influence any other matters that affect the commercial arrangements between winegrape growers and processors.
- Research, development, extension and adoption ‑ facilitate, coordinate or conduct relevant research, education, extension, and programs that promote the adoption of innovation that improves the profitability and sustainability of winegrape growing.
- Raise the status of winegrape growers – build industry relationships and the profile of winegrape growing in the wine sector and wider community to benefit winegrape growers and position winegrape growing as a full equity partner within the wine sector.
- Member information services ‑ obtain, develop and publish information concerning wine and winegrape production, sales and marketing, and any other information of interest to winegrape growers
- Two-way communication – engage with winegrape growers nationally through effective two-way communication.
- Organisational capacity ‑ ensure growers have an effective national representative association through; sufficient membership and funding, professional representation, membership or support for other national representative organizations as may be in the interest of members generally, and employment of officers and staff, or consultants and contractors, required to undertake the objects of the association.
- Corporate governance – maintain effective corporate governance, devise and report against a strategic and annual operating plans, and apply the funds of the association to the above objects.
The organisation is funded by grape growers either through individual memberships or via a proportion of the levy paid to their state grower organisation.