Gerrewey studied architecture at Ghent University and literary science at KU Leuven, and completed a PhD on "Architecture a user manual. Theory, Critique and History since 1950" on the work of architecture critic Geert Bekaert. Since 2015, Van Gerrewey leads as tenure track professor the laboratory of Architecture, Critique, History, and Theory (ACHT) at École Polytechnique Fédérale de Lausanne (EPFL), Switzerland. He teaches architecture theory.

Gerrewey's current research focuses on the critical reception of the work of OMA/Rem Koolhaas (1975-1999), the genesis of the Kunsthal in Rotterdam by OMA/Rem Koolhaas (1987-1992), architectural writers of the twentieth century, the relationship between architecture and philosophy since the Second World War, and a short history of metropolitan theory in Switzerland.

His texts on architecture, literature, performing arts and visual arts have appeared in magazines such as De Witte Raaf, Etcetera, Ons Erfdeel, De Leeswolf, Domus, De Brakke Dog, De Gids, nY, A +, NRC Handelsblad, Streven, Rekto: Verso, The Architect, The Reactor and Metropolis M. He is a member of the editorial board of the art and architectural magazine De Witte Raaf.

In 2010 a collection of stories 'Five disease stories' was published. And in 2012 he published his debut novel "Op de hoogte" in Antwerp, a novel in letter form about love lost. In 2013 he received the Debuutprijs from boek.be for this, in 2014 the literary prize for East Flanders and in 2016 the "European Union Literature Prize 2016". In 2013 his second novel "Train with delay" also appeared. In 2015, the essay collection "Over everything and for everyone" followed. In 2017 his novel "Werk Werk Werk" was published by Polis.

Awards
European Union Literature Prize 2016 for the novel Op de hoogte (De Bezige Bij, Amsterdam, 2012).
Prize for Young Art Competition, Review category and Essay category (2008)
Essay prize from Philosophy Magazine (2000)