The rapid 21-year-old wide man completed his move from Marseille on transfer deadline day, having scored 10 goals in 41 appearances during a promising 2015-16 campaign at Stade Vélodrome.
Prior to that, he spent two years in and around the senior set-up at league rivals Nantes, racking up 32 appearances and scoring twice during a season of gradual progress in 2014-15.
However, as Damien points out, it’s been his electrifying form in the last 12 months that has really got people talking.
Here, Damien offers us his expert insight into the endeavours of ‘GK’ in the French top flight…
How much progress has GK made in France in the last couple of years?