|I am not positive how the Windows Photo Gallery software handled tags. If the tags were processed as a file property for each image, you might be able to see them in File Explorer.
Open File Explorer and navigate to a folder of images that you have tagged. Then use the File Explorer VIEW menu to select "Details" as how you want to see the files. That will display a list of files using a series of columns (usually Filename, Type, Size, Date).
Right click in the column header row to display a checklist of possible columns. Check "Tags" to display the tags column. If your previous tagging attached to the images as a file property, the tags may be visible now.
EDITED TO ADD: In File Navigator, the left hand portion of the ribbon allows you to select "Details Pane." When you click that, the viewing area divides to show a panel on the right with many lines of file properties. One of the lines is "Tags" and the adjacent field allows you to add tags (if the file type supports tags, ok for jpg, not for png, probably not for raw files). Another line is "Comments" with an adjacent field that lets you add comments (if the file type supports comments).
The limits imposed by file type make other keywording solutions more attractive than tags, but if you have already put the effort into tagging, file navigator might be useful.
Message edited by author 2019-06-08 17:19:04.