1. Go to Module builder and create a module
2. Add a field of type Related media > Images
3. Click Continue to finalize configuring the field
4. For Display selected items on the frontend using... select Custom from the dropdown
5. In the Type or Virtual path of the custom widget textbox enter the full type name of the Image gallery controller: Telerik.Sitefinity.Frontend.Media.Mvc.Controllers.ImageGalleryController, Telerik.Sitefinity.Frontend.Media
6. Click Done
7. Click Finish
8. Activate the module
9. Go and create at least one dynamic content item from the newly created type
10. Type the Title and select 5 images for Related images field
11. Change the templateName and list settings of the Image gallery in Dynamic Content detail template from Sitefinity's administration panel -> Design -> Widget templates and open the Detail.[Name of your type]

@Html.Action("RelatedData",
"ImageGallery",
new {relatedItem = Model.Item.DataItem,
relatedDataViewModel = new RelatedDataViewModel()
{
RelatedItemType = "Telerik.Sitefinity.DynamicTypes.Model.MyModule.MyType",
RelatedFieldName= "MyRelatedImages",
RelationTypeToDisplay = "Child"
},
templateName="ImageGallery",
settingsViewModel = new ImageGallerySettingsViewModel()
{
ItemsPerPage = 2
}})

1. Go to Pages and create a page
2. D&D Dynamic content widget
3. View the page and go in the details of the item

Result

2 pages are displayed instead of 3.