[6] Guéguen was playing for the Gallia Club when the USFSA selected him as a reserve for the French B squad that was going to compete in the football tournament of the 1908 Olympic Games, but he ended up not traveling to London, thus avoiding France B's humiliating 0–9 loss to Denmark on 19 October.
[7][8] Nicknamed "the great spring", he was described in the French press as "a solid guy, cut with an axe, topped with a Breton head".
[9] On 27 February 1913, the 27-year-old Guéguen earned his first (and only) international cap for France in a friendly match against England amateurs at Colombes, which ended in a 1–4 loss.
[1][10] Warned at the last moment, he had to travel all night directly from Brittany, arriving only two hours before kick-off, and then to make matters worse, he immediately took two balls to the face,[5] which earned him a bloody nose, thus being very mediocre at the start, missing everything he attempted, but he improved in the second half, making the assist to André Poullain for his side's only goal, which was greeted with thunderous applause.
[11] A 1st class private of the 247th Infantry Regiment, Guéguen was killed by the enemy in Souain, Marne, during the Second Battle of Champagne, on 25 September 1915, aged 30.