McGill's Bus Services is a bus operator based in Greenock, Scotland. The company has grown to operate a network of routes covering much of Inverclyde, East Renfrewshire, Renfrewshire, North Lanarkshire, Glasgow City, North Ayrshire, West Lothian and Dundee. McGill's have several depots based in Greenock, Inchinnan, Johnstone, Edinburgh, Bannockburn, Balfron, Livingston and Dundee. McGill's had former depots in Dumbarton, Barrhead and Coatbridge