The 2011–12 season was somewhat of a breakthrough year for Gilbert as he reached the last 16 in two ranking event tournaments for the first time. He went from qualifying round one to the venue stage of the first tournament of the year, the Australian Goldfields Open, beating Passakorn Suwannawat 5–4, Alfie Burden 5–2, Dave Harold 5–4 and Mark King 5–0 to set up a wildcard round match at the venue against James Mifsud, which was later changed to a last 32 encounter due to the withdrawal of Graeme Dott. Gilbert won 5–1 to meet Mark Williams in the last 16, and was beaten 2–5.