Gibson is situated in the Barossa Valley, South Australia's most celebrated region for Shiraz. The winery focuses on old vine Shiraz, a varietal that thrives in Barossa's warm continental climate and produces wines of depth and structure. The Australian Old Vine Collection Shiraz represents the core expression of the vineyard's philosophy, with releases rated by Decanter, Wine Advocate, Wine Spectator, and Falstaff. A Reserve Shiraz rounds out the portfolio, offering a more concentrated interpretation of the region's signature grape. Barossa Valley's sandy loam and red earth soils, combined with diurnal temperature swings, create conditions ideal for ripening Shiraz to full phenolic maturity while retaining freshness. Gibson's commitment to old vine material—vines that yield smaller crops of more concentrated fruit—anchors its approach to winemaking in this storied terroir.