QuickLook-Fullscreen-Gallery 1.0 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is miragliuolo. The most popular version of the application is 1.0.
From the developer:
QuickLook Fullscreen Gallery is a free and open source QuickLook plug-in that enables you to access QuickLook in full-screen mode.
Once the program is installed in Finder's toolbar, you can simply click it when viewing a folder which you would like to QuickLook. Once clicked, you can use the LEFT or RIGHT keys to navigate, or you can click the button called Index Sheet.