Piwigo is written in PHP and MySQL which is used usually on web servers. AFAIK there is no stand-alone version.
So you would have to get creative...

You could of course have everyone install a web server locally (only a few clicks with WAMP), but this might be too complicated for some?

Or you could (automatically? somehow?) save the whole gallery as html files, from the web server - so after processing. However, a search funcion would not really work here.

At least you could create physical albums from your virtual ones, so that at least the hierarchy remains (however meta data, comments etc. are still in the database). So your family could directly watch the photo files in the album hierarchy.

I don't know how you could turn this web application into a stand-alone executable... maybe there is a way?


Why just not put it on a web server for everyone to access, and restrict the access if you don't want it to be publicly open?
This can be easily done and is actually what PWG was made for :-)

The best way to make the same version of a photo album accessible to several people with no particular computer knowledge is to put it online at a hosting company. With the option of a password barrier if greater confidentiality is required. Piwigo does this very well, and that's what it's made for.