Neither yesterday or today i saw GHQ with current girls, hopefully they will implement it soon... if not it would mean i was screwed and lost 2 SR when they flipped cards.

Each day of the week GHQ is differens.

New girls from area 9-1 to 10-9 are in GHQ Saturday maybe on other days too.
GHQ was changed when whey interduced area 9-1 to 12-9.
All the unlocked grils should be in GHQ atleast once per week unless GHQ is bugged.

If GHQ is bugged it will be fixed soon. Don't worry you will get the girls you missed someday.

If i remember correctly i saw another GHQ for stage 3 at wednesday or thursday. They will most likely keep adding more of them as stages are unlocked. Perhaps the list will be scrollable later to accomodate for the amount of stages :P

GHQ

Monday Stage 1 first half.
Tuesday Stage 1 2nd half.
Wedensday Stage 2 first half.
Thirsday stage 2 2nd half.
Friday stage 3 fiste half.
Saturday stage 3 2nd half and Stage 1 first half.
Sunday stage 1 2nd half.