Is there a way to add multiple groups to a gallery such as Maps and Apps Gallery, Minimal Gallery, or Public Gallery? I have 20 Story Maps I want to be able to show in a gallery. Problem is I need to sort them by year and with how they're titled ordering them by title or modified date do not order them in a sensible way. So, the thought is creating groups for each year. The other idea was to create one group and nest sub groups in it but from what I've read that cannot be done.
So is there a way to add multiple groups to a gallery?