Goose eggs are hard to hatch out. Unless you're wanting tons of eggs, it may be best to let them hatch out their own, or at least have another broody goose or muscovy hatch out the eggs for you.
Though, once hatched I recommend taking the goslings, or at least some of the goslings, from the pair when they hatch for a bunch of reasons. First off, your geese will begin laying again with their new family gone, which means you can get 2-3 clutches out of each goose every year. If you are raising geese for meat, for sale or to build your flock then this is beneficial. If not, then taking the new goslings away means you can now enjoy goose egg omlets for the remainder of the season.
Secondly, goslings _and_ parents will be much more friendly when separated. The goslings will bond with people and, when placed back out with the flock, will still remain pet-like. If you decide to sell goslings to others then no matter the age, the new owners will appreciate having more mellow, friendly geese.
Geese _love_ baby food. If you want your babies to grow faster, or you want to make sure they are getting the nutrients they need, then separating them out means you can feed the goslings their baby food without worrying about the parents happily indulging.
On the other hand, leaving the goslings with the parents means you'll be keeping the parenting instinct strong. Plus it's tons easier to let the parents do the hard work rather than have you do it.
Congratulations on your pair. Hope you have a great hatching season
