I appreciate that you have let us know which theme you are using as that is very helpful! Looking into the options available using the Galleria theme, we can manually change the coding of the footer to allow your logo to appear. Since the Galleria theme was not developed by Shopify, we are a bit unfamiliar with the style of coding that is being used. It would be best to direct this inquiry to the developers of the theme as they would be in the best position to provide additional support and insight to make this change. I did see that the third-party theme is designed and supported by Mile High Themes.