You can load a GeoPackage directly from a URL by including a gpkg parameter in the URL. Specify which layers (if any) you would like to load with layers parameters.

For Example https://ngageoint.github.io/geopackage-js/?gpkg=http://ngageoint.github.io/GeoPackage/examples/rivers.gpkg&layers=rivers

Open a GeoPackage or Convert a Supported File Type

Supported file types for conversion are GeoJSON, Shapefile, Shapefile Zip, MBTiles, KML and KMZ

- or -

Open one of these samples:

More GeoPackages can be found at https://www.geopackage.org/data.html