Lightroom’s own built-in/Adobe gallery options do not appear to support keyword-based navigation in the way you want. Based on the community replies, Adobe Revel doesn’t even show EXIF keywords.

A practical alternative mentioned is Flickr: it displays keywords, and viewers can click a keyword to browse matching photos. However, that navigation may include both your photos and other users’ photos unless Flickr provides a way to limit the view to only your own images.

So, if keyword-driven browsing is important, Lightroom’s built-in gallery/publishing tools are likely not the right fit, and a service like Flickr is a better match.