GLOW is an international organization to further the study of generative grammar, founded in 1977 and based in the Netherlands.
In the past, GLOW published a newsletter that discusses current intellectual (and organizational) issues in the study of generative grammar.
It was founded in an attempt to provide an annual meeting for European researchers in Generative Grammar who felt themselves largely excluded from other organizations in the late 1970s.
Its founding document, the so-called GLOW Manifesto authored by Jan Koster, Henk van Riemsdijk and Jean-Roger Vergnaud, declared that "generative linguistics acquired a new momentum in Europe after Chomsky's [1973 paper] 'Conditions on transformations'" and sought to reflect that momentum with a new organization.
The 2015 Colloquium was held in Paris, the 2016 meeting took place Göttingen, in 2017 Leiden was the host, in 2018 Budapest, in 2019 Oslo.