In GeneratePress, tags are separated by ‘comma’ when they are displayed on the front end of the website. In some cases, that may not be what you are after.
Here’s a simple code to remove ‘comma’ between tags on GeneratePress.
add_filter( 'generate_tag_list_output', function( $output ) {
$tags_list = get_the_tag_list( '', '' );
return sprintf( '<span class="tags-links"><span class="screen-reader-text">%1$s </span>%2$s</span>', // WPCS: XSS ok, sanitization ok.
esc_html_x( 'Tags', 'Used before tag names.', 'generatepress' ),
$tags_list
);
} );