Disable styles completely
Image Choices version 1.3.10 + now includes a filter you can add to your theme to totally disable Image Choices styles completely. With this filter added, you’ll need to add your own custom CSS to style the layouts and styles of all your image choices fields.
Just add the following to your theme functions and the default CSS will not be enqueued.
add_filter( ‘gfic_enqueue_core_css’, ‘__return_false’ );