Luis Gil leaves with the U.S. Under-20s as they prepare for the FIFA U-20 World Cup, which starts in about two weeks. Gil and the rest of the U-20s could be gone until after July 13, should they reach the final; the soonest they would be done is after June 27, but for the sake of winning trophies, let's hope they're gone longer.
Of course, given the U.S. is stuck with Spain, France and Ghana, it could well be an uphill battle.
First, let's go over the matches Gil could miss.
Gil definitely misses...
June 12, RSL v. Charleston Battery
June 22, RSL v. Seattle Sounders
June 29, Toronto FC v. RSL (almost definitely)
Gil could miss...
June 26, if RSL progresses in US Open Cup
July 3, RSL v. Philadelphia Union
Let's also take a look at schedule the U.S. U-20s could face.
Group stage matches
June 21: USA v Spain
June 24: USA v France
June 27: USA v Ghana
Round of 16
July 2: Winner of group A v. Winner of group C OR Runner-up of group A v. Runner-up of group C
July 3: Winner of group C OR Winner of group B v. Third-placed team, should the U.S. finish in the top four of third-placed teams across all groups, ranked by points, goal differential, goals scored, and the drawing of lots.
Group C includes Turkey, El Salvador, Colombia, and Australia; Group B includes Cuba, South Korea, Nigeria and Portugal.
July 6 OR July 7: Should the U.S. progress past the round of 16 having finished first or second place in their group, they would play July 6; should they finish in third place AND be one of the top four teams in third-place ranking.
July 10 in Bursa or Trabzon
Finals or third-place
July 13: The finals will take place in Istanbul, Turkey