Although I dont keep gargs, I do keep cresties and I would think they are similar in care and temperament. Two males are generally a no go with most things, whereas one male to 2 or 3 females or a pair or trio of females usualy get along better. But, there are no guarantees that everyone will always get aon. I kept my cresties together for about 6 weeks to breed them, and ended up splitting them up to give the female some space to lay without the mae around. When I tried to put him back in with her she was having none of it so I keep them in their own vivs now.