If you are wanting to get some goslings be sure to introduce them to her slowly and safely. She may not take to them right off and you don't want them hurt. When my goose lost her only gosling to make it almost to hatch. Died in the shell. We brought home 2 two day old goslings for her, she wasn't interested for about a week so I brooded them inside and took them out multiple times during the day and would sit and watch, Missy became more interested by the day. I did wait till they were 3 weeks old before they spent their first night with her and my gander mainly because my gander is so spastic I was afraid he'd accidentally step on one, by 3 weeks they were big enough to take it. That was the most precious site to watch Missy lay down in her coop and see those 2 little ones cuddle up next to her. My story is a little different but the end should be the same. Geese love babies and have such strong parental instincts it's a blessing to watch, As for eggs boy they make awesome omelets. I don't think I'd let her sit on unfertilized eggs but if your sure you can get goslings then you may be able to switch out eggs for babies with out any problems. Please let us know what you decide .
.