The county’s Visually Impaired team will travel to Frimley for the final, having seen off the Dorset Dolphins in the semis.
It is a fantastic achievement for the club – which was only formed in 2012 and had never won a game in the competition until this season.
Their first success came with a five wicket victory against the London Metro Devils.
They then chased down their target of 173 with two overs and eight wickets to spare against the Dolphins. Captain John Gribbin led the way with a half century to create history for his team.
Supported by the Gloucestershire Cricket Board, the Growlers are part of the BCEW South and West Development League and play their home games at Hatherley and Reddings CC in Cheltenham.
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Jon Gribbin (C)
Ed Hasting (VC)