One issue which limits the use of the Gallery block in Gutenberg is the inability to link the images natively to another URL. The only option given is to have a text description which can be linked through a text URL.
Enter the free plugin “Gallery Custom Links” this plugin provides you the access when adding a picture to the gallery to choose a URL that the image can link to.
I haven’t had anything but good experiences since trialing this to resolve an issue someone had on the Project24 forums. If you would like to implement the Gallery then this is a good way to do it.
Give it a try and comment below if it was helpful. I would love to see how you used it if you want to share your website!