(1). The Museum of Scotland's GM exhibition is the first with a place and people-specific narrative as well as what appears to be additional gamers (but I need to double check the catalogue before I can confirm this).
(2). The website states: Scottish superstars:
From the early 1990s, Scotland has been recognised as the home of some of the UK's leading game developers. For its Scottish stay, Game Masters featured the work of four pioneering Scottish companies.
DMA Design, from Dundee, created some of the most innovative games of the 1990s, including the hugely successful Grand Theft Auto (1997) and Britain's fastest selling game, Lemmings (1991).
Also from Dundee, recent University of Abertay graduates Space Budgie brought their innovative new game Glitchspace (2014) to the exhibition, offering you the chance to experience what it is like to programme code while solving challenges in a cyberspace world.