Hello,
If you want to change which images are shown in the archive item, you will want to adjust the GD Post Images shortcode in use in the Archive Item template, a WP Page that contains all the shortcodes that produce the display you see on the CPT Archive.
Currently you are using the default shortcode, and this wil display the post_images field as well as the logo by default.
If you only want to show post_images, you will need to change that shortcode to specify that behavior.
Currently you have:
[gd_post_images type='image' ajax_load='true' link_to='post' show_logo='true']
Here is an option:
[gd_post_images type="image" ajax_load="1" slideshow="1" show_title="1" animation="slide" controlnav="1" link_to="post" types="post_images"]
You can use the shortcode builder to configure GD Post Images with any of the many many options available to find the right settings to meet your requirements.
https://wpgeodirectory.com/docs-v2/geodirectory/shortcode-builder/
https://wpgeodirectory.com/docs-v2/templates/archive-item/