Ticketed entry information has been updated again:
https://home.nps.gov/glac/planyourvisit ... dentry.htm
Tickets go on sale starting March 2 at 8am, and will be offered on a rolling 120-day basis for half the tickets. The other half will be available for purchase 1 day in advance (Starting May 26 for May 27).
Ticketing hours are 6am-4pm for the GTTSR, and 6am-6pm for the North Fork.
Ticket checkpoint on the east side has been moved to Rising Sun instead of the St. Mary entrance.