yes
Gamestop is open every day tilll 1 in the morning
Usually, Gamestop is not open on Memorial Day. To check if your local Gamestop will be open on Memorial or if they have special hours of operation click on the link below (which will direct you to their store locator page).
The closing time of gamestop depends on the location and the day. Some stores in the same city might not even close at the same time. Check on GameStop's website or call the closest GameStop to know the detailed schedule.
In the UK they are, the UK does not recognise presidents day as is true with many countries.
yes
Its last day of operation was a December 31st.
George Washington (Feb 22) and Lincoln (Feb 12) are the presidents associated with President's Day.
Perhaps but most schools close.
GameStop has sales all the time, ranging from between store hours, to all day (through online buying).
Most schools close for holidays.
No
Yes it is. Presidents day isn't a observed Holiday by Costco.