If the gates at a park are staffed, Guest Reations at that park is staffed.
Its not a just an "extra" service, it is an integral part of the parks' operation.
They wouid no more get ready to open a park without Guest Relations windows in operation, than allow guests to enter a ride without CM operators.
There are MANY guest situations (like problems with inoperable or lost tickets) than must be handled through Guest Relations.
Reply's of "Oh, there might be someone to help you over there in a half-hour or so." wouldn't cut it.