For jams, jellies, and pies, pick gooseberries when they have reached full size, but are not fully ripe. The fruit are green, tart, and still quite hard. Fully ripened fruit is pinkish in color and sweeter.
Gooseberries can be refrigerated at 35-40°F for approximately two weeks.
Iowa Specialty Crop Growers Association
Data credit 1
ISU Extension and Outreach