There's a couple of well known women with this name (https://en.wikipedia.org/wiki/Ga%C3%ABl_(given_name)), and its inherent meaning is also unisex ("person of gaelic descent", "person who speaks gaelic", etc), so I believe it'd be correct to change the categorization to be marked as unisex. This would help people who are looking for unisex names.
https://www.behindthename.com/name/gael/top/basque-country
https://www.behindthename.com/name/gael/top/catalonia
https://www.behindthename.com/name/gael/top/galicia