Shortcuts: Sort pictures before handing them to Shortcut to make GIF (iOS / macOS)

I am using Shortcuts to make GIFs from the sharing menu - which works really great! Sadly I am not able to define in which order the images will be compiled to the GIF. Is there a way? I haven't found anything ...neither on the web or in the Shortcuts command sets. Would be really grateful if there was a solution for this! Cheers!