I would like to ask whether, when booking as a Gold status member, the price is lower than with Silver status?

My question is related to the fact that I want to make a reservation and at the same time take advantage of the challenge match to Gold. If I make the reservation as a Silver member, but on the day of check-in I already have Gold status, will I receive Gold benefits even though I made the booking while still having Silver status?

Additionally, in Garden Inn hotels, does Gold status include free breakfast?