Career
Born in Glasgow, Gibson became a supporter of home rule for Scotland through his membership of the Young Scots" Society, an affiliate of the Liberal Party. He fought in World War I, and on his return, joined the Scottish Home Rule Association. He left the group in 1924 in opposition to its support of John Maclean, and instead joined the Scots National League.
He quickly became the group"s leading figure, and ensured that it became the core of the National Party of Scotland, which he founded in 1928.
In his absence, the National Party began splitting between supporters of independence and those who favoured devolution.