So the point to telling you about my Flock-Dynamics is simply to illustrate that you never know what you're gonna get whenever you bring home 2 parrots instead of 1, and even if they seemingly get along wonderfully well and seem to be very closely-bonded to one another while they are babies/juveniles, the likelihood of their close relationship/bond staying the same after each of them goes through puberty is slim....For this reason I highly suggest that you have a cage/set-up for each of your 2 birds, so that they each have their own cage, toys, food/water dishes, etc., basically their own, individual "territories", so that the odds of them bonding-closely to each other right away is much higher, since they won't be having to share their territories with each other right from the start, and then whenever they each go through puberty you'll already have them each in their own territories and everything will just be "status-quo", the idea being that whenever those sex-hormones kick-in for one or both of them the fact that they each already have their own territory and have since the day they came into your home as young babies, there will have been no jealousy/territoriality between them AT ALL at any time during their lives, so they already know that they don't have to worry about "sharing" their territories with each other, and then any aggression that their sex-hormones start up will not be focused on each other (hopefully)...(remember, 2 different birds equals 2 different puberties equals 2 different chances of their relationship/bond becoming aggressive/violent) There are actually many, many people who have gotten 2 young, baby/juvenile parrots at the same time, and who have just automatically gotten each of them their own cages, toys, perches, bowls, etc. without even thinking about how Territorial most-all species of parrots naturally/innately are, and without any thought to them not getting along due to jealousy, dominance, and overall-territoriality, but simply because they either just wanted them to each have their own cages, OR (Very Wisely) because they wanted to be sure that they didn't start breeding and that the female of the pair didn't start laying infertile-eggs chronically once she hit puberty due to her sex-hormones being constantly "Triggered" by being forced to live with a male and share her territory with a male (another reason...*****]And these people are ALWAYS the ones who come here to the forum and become members, and are the ones who always respond "I don't know why but my 2 birds have NEVER been aggressive towards each other, they have never fought with each other, they get along really, really well and have since I brought them both home when they were young babies"...And usually they are responding to a Thread/Post made by someone who's 2 birds "Who have always gotten along since I brought them home, now suddenly started attacking each other (or one bird starts attacking the other), and one or both are getting injured, and I don't know what to do", and we find out that they have always had their 2 birds in the same cage since day 1, and one or both of them are between 1-2 years-old...While in contrast, the members who are responding to this person's problems and trying to help them have always had their 2 birds (or more) in their own, individual cages from day 1, and they didn't even know when they went through puberty because it went so smoothly with NO TERRITORIALITY AT ALL.
So that's the best piece of advice that I can give you right at this critical moment, 3 days before you brinng your 2 GCC's home on Monday, is to please get them individual cages/set-ups now so that your lives remain happy and healthy for the long-haul...Also, I don't know if you're planning on breeding your 2 GCC's and that's why you got both a male and a female purposely, but what you need to know is that the same rules apply to males and females when you put them together! You cannot just put a male and a female parrot of the same species together and have them breed like you can with dogs, cats, etc. Once again, Parrots form their relationships with each other just like we do as people, and in-order for a male and a female parrot to start mating/breeding, they must FIRST like each other, then gradually form a bond with each other, until finally sometime after they both get through puberty and then reach one of the 2 yearly, natural Breeding-Seasons (spring and fall for GCC's), and then IF their bond with each other is strong enough and the type where they want to mate, then they'll mate...I bred and hand-raised multiple different species of parrots for just over 20 years, as did my mom and my grandmother (Green Cheek, Sun, Jenday, and Nanday being the Conure species I bred/hand-raised), and I can tell you that the minute "You Choose" 2 parrots to put together in-hopes that they'll bond-closely and eventually start mating/breeding, based on their colors/mutations and genetics in-general that you desire to breed together, the more and more time you waste...In contrast, if you just allow all of your birds of a certain species to spend SUPERVISED time out of their cages together each day and you allow them to hopefully choose their own mates and develop a close-bond to one another on their own, you'll have a breeding-pair of birds that are going to not only actually mate/breed, but the odds of the eggs being fertilized, viable, and successfully hatching/developing is much, much higher.
Also, last thing I'll say I promise, but I'm assuming that you are bringing home these 2 GCC's to be your "pets" or members of your family, rather than buying them specifically to be breeder-birds...If I'm wrong about that and that actually is your purpose, then there is a lot of other stuff you need to know about obviously, and there are many very experienced, reputable, long-time parrot Breeders/Hand-Riasers here on the forum that can help you with any questions you have or anything you need regarding breeding/hand-raising/hand-feeding...However, assuming that you are NOT buying your GCC's as Breeders but rather as "pets" and to make them members of your family, you need to be aware that it is extremely rare for a bonded-pair of Breeding parrots to STAY BONDED TO THEIR PERSON/PEOPLE. That's something that a lot of people aren't aware of or don't really think about when they first make the decision to breed their male and female "pet" parrots/birds, and it's absolutely heartbreaking when it happens because the owners basically lose their bond with their babies. And it happens simply because when 2 parrots of the opposite sex (and sometimes even of the same sex, as we are becoming more and more aware of) bond very closely with each other in the same way that a parrot bonds extremely closely with a person, then they are basically given a choice between bonding closely with and having their "mate" be either a person, or being another bird of the same species, and of course when given that choice they are pretty much ALWAYS going to choose the other bird, just as we would choose another person in the same situation...So keep that in-mind always before you make any decisions to try to get them to mate/breed if they do happen to bond very closely with each other...