G de Château Guiraud is produced from 15 ha, constiting in 70% Sauvignon and 30% Semillon (rootstock Riparia, R 110, 3309, 161 49), with a planting density of 6600 vines/ha and an average age of 15 years. "G" is a dry white wine made of ripe but not mouldy grapes.
The grapes are harvested choosing the ripest bunches or portions of bunches. Excluding all moulding or green grapes. A second selection through the vines may be necessary. After pressing and keeping only the very first juice, the juice is clarified at a low temperature (10°c) for 24 hours.
The fermentation starts about 12/13°C and finishes at about 19°C. It occurs in oak barrels and the lees are regularly stirred for the first 3-4 months. Barrel aging usually lasts for 9 months.