Congrats on ordering your goslings! I got two American Buffs as goslings several years ago, and I absolutely love my girls.
Many of the same guidelines apply as with chicks in terms of keeping them warm, making sure they have feed and water, and keeping their bedding clean. Goslings, of course, tend to be bigger and need larger housing. Also, they should not be housed with chickens as they are far messier and will bring moisture your chicks shouldn't have.
Although goslings can swim almost immediately, they will chill easily until they are better feathered out. Like chicks, you don't want them to get too cold. Some people suggest not letting goslings have water deeper than a water dish until they are at least two weeks old; I think I kept my girls out of "deep" water for much longer.
Handle them daily and make friends while they are young. You don't want a full-grown goose who isn't socialized. Size matters, and a big, angry goose can be a handful. Or, give you a black eye with an errant wing to the face.
Mature geese lay huge eggs; each is big enough to make a delicious three-egg omelet.
BTW, my poultry runs free together during the day. Some chickens are afraid of the geese, and the geese are afraid of a few of the more-aggressive hens. The geese mostly leave the chickens alone, however, they love to "herd" my runner ducks.
Best wishes on your new undertaking!
