The 19-year-old completed her hat-trick of titles with an 8 & 7 victory over Di Aitchison in Sunday's 36-hole final at L'Ancresse.
'It feels very good to win three in a row,' said Gaudion, who will now aim to win her first Channel Islands crown when that final is played in August.
Also over the weekend, Josh Neville won his first Island Junior Boys' Championship title as he defeated Alex Mills 4 & 3 in their 36-hole final.
Meanwhile, in the clash of the Eggo brothers, Bobby edged out Andy 1 up in the 18-hole final of the Island Senior Men's Championship.
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