We do it all the time! My wife loves the large pumpkin and pecan pies from Costco, so when the season comes around we usually buy three or four each to freeze throughout the year.
@Strauss The Costco pumpkin pie remains 5.99 which is a great bargain because it’s actually really good and it’s also huge. I never thought of freezing it – I just eat about half within a week and then I throw it out.