What size portafilter does the Gaggia Classic GT use?
The Gaggia Classic GT uses a 58mm portafilter (58mm commercial).
Do standard 58mm baskets fit the Gaggia Classic GT?
Yes — the Gaggia Classic GT uses the 58mm commercial standard, so standard 58mm baskets fit. Depth and shape still vary between baskets, so check the individual entries below.
Does the Gaggia Classic GT take pressurized or non-pressurized baskets?
It uses non-pressurized baskets.
Which baskets are confirmed to fit the Gaggia Classic GT?
Gaggia 58mm Single-Shot Filter Basket; Gaggia Barista Pro IMS Filter 20g Nanotech; Gaggia Crema Perfetta Pressurized Basket Kit; IMS B68 Competition 2 Cup (B682TH24.5M); IMS B68 Competition Convex 2/3 Cup (B682TCH26.5E) — each verified against manufacturer sources (listed below).
Sources
https://classicgt.gaggia.com/app/uploads/2025/02/TECHINFOGAGGIACLASSICGT.pdf(archived) — Official Gaggia Classic GT technical information PDF, read firsthand 2026-07-06. States verbatim: 'Filterholder & filters dia. 58mm'; 'Filters included: 1 traditional double filter (18g); 1 traditional single filter (up to 11g); 1 blind filter'; filter holder material 'Stainless steel'; boilers 'Brass (Brew) / Stainless Steel (Steam)'. Traditional filters are Gaggia's non-pressurized commercial-style baskets.
https://www.gaggia-na.com/products/gaggia-classic-gt(archived) — Official Gaggia North America product page, read firsthand 2026-07-06. Lists the included '11g Single-Shot Basket' and '18g Double-Shot Basket' plus a 'Wood Handle Tamper with Stainless Base'. The page itself does not print the diameter — the 58mm figure is stated explicitly in Gaggia's tech-info PDF above.