Start with Grid Gallery:
Whale Grid Gallery comes with a dashboard gallery generator that makes it exteremely easy to use for site admins. You can create your gallery at the dashboard, save that and then use it as a ready-to-go gallery on every page you want. These are steps to use this add-on:
1- After installing the add-on you can see a "Grid Gallery" link in the "Files" box of your dashboard.
2- Click on the link, and you will see list of galleries already made.
3- Go to the page you intend to add your gallery, select "Grid Gallery" block, select a prebuilt gallery and you are done.
How to setup a gallery with filter:
Whale Grid Gallery uses core image tag property for categorize images. These are steps to add filter buttons to your gallery:
1- At File Manage right click on image and select properties, you can insert tags. You can insert multiple tags by separate them with comma.
2- Now at Grid Gallery: Filters tab you can see list of all tags available. Select those you want to appear as filter button and save gallery.