Stacking Single Vertical & Horizontal Images on Mobile

I'm looking for custom code to have my 3 image (simple) gallery on desktop stack to single images, allowing them to be full images both vertical and horizontal on mobile instead of the default of 2 columns.

I found code that seems to allow for only horizontal images to display while cropping the vertical ones. You can see this on my "Interiors" tab on my site. I want all images to stack in full like my "Work in Progress" area below on my mobile site. The "work in progress" stack correctly because this is a "strips" grid. 

The code I currently have on my site is the follow: 

@media screen and (max-width:800px) {
.gallery-grid-wrapper {
    grid-template-columns: repeat(1,1fr) !important;
      grid-row-gap: 3vw !important;

My site is located at  www.jackbrownstudio.com 

Thank you!

Hi,

Where is Work tab?

Sorry, it's under the "interiors" header. 

https://www.jackbrownstudio.com/interiors

Can you provide a mockup or sketch of what you are trying to achieve, and explain it in a different way? I'm confused about what you want to be able to do, and whether you are trying to make changes to the mobile view when the device is oriented in portrait or in landscape.

This section is correct because it shows the full image whether it's vertical or horizontal. This is in my "works in progress" which loads full images because it's a strips gallery. 

This is the top section of my interiors page and because it's in a grid, my default it shows 2 columns, but I used the above code to force single image but it doesn't allow vertical (portrait) image to fully load, it makes them horizontal (landscape). I'd like for all images in my interiors section to load full images, whether portrait or landscape. 

This is a video of how I'd like all images to load, both portrait and landscape. This is the "strips" gallery. 

This is the grid gallery but with the added code above, it only loads images in landscape and forces portrait images into landscape. I'd like them to fully load, no matter landscape or portrait.