Category Tag & Author Tag in blog posts

@gmg-jet: As you’ve already created the child theme. Add the following code in you child theme’s functions.php

function gridalicious_entry_meta() {
	echo '<p class="entry-meta">';

	$time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';

	if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
		$time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
	}

	$time_string = sprintf( $time_string,
		esc_attr( get_the_date( 'c' ) ),
		esc_html( get_the_date() ),
		esc_attr( get_the_modified_date( 'c' ) ),
		esc_html( get_the_modified_date() )
	);

	printf( '<span class="posted-on">%1$s<a href="%2$s" rel="bookmark">%3$s</a></span>',
		sprintf( __( '<span class="screen-reader-text">Posted on</span>', 'gridalicious-pro' ) ),
		esc_url( get_permalink() ),
		$time_string
	);

	if ( ! post_password_required() && ( comments_open() || '0' != get_comments_number() ) ) {
		echo '<span class="comments-link">';
		comments_popup_link( esc_html__( 'Leave a comment', 'gridalicious-pro' ), esc_html__( '1 Comment', 'gridalicious-pro' ), esc_html__( '% Comments', 'gridalicious-pro' ) );
		echo '</span>';
	}

	edit_post_link( esc_html__( 'Edit', 'gridalicious-pro' ), '<span class="edit-link">', '</span>' );

	echo '</p><!-- .entry-meta -->';
}

Then create a new file and save it as content.php in your child theme, then copy the following codes into it.

<?php
/**
 * The default template for displaying content
 *
 * Used for both single and index/archive/search
 *
 * @package Catch Themes
 * @subpackage Gridalicious
 * @since Gridalicious 1.0
 */
?>

<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
	<div class="archive-post-wrap">
		<?php
		/**
		 * gridalicious_before_entry_container hook
		 *
		 * @hooked gridalicious_archive_content_image - 10
		 */
		do_action( 'gridalicious_before_entry_container' ); ?>

		<div class="entry-container">
			<header class="entry-header">
				<h1 class="entry-title"><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></h1>

				<?php if ( 'post' == get_post_type() ) : ?>

					<?php gridalicious_entry_meta(); ?>
					<?php gridalicious_tag_category(); ?>

				<?php endif; ?>
			</header><!-- .entry-header -->

			<?php
			$options = gridalicious_get_theme_options();

			if ( is_search() || 'full-content' != $options['content_layout'] ) : // Only display Excerpts for Search and if 'full-content' is not selected ?>
				<div class="entry-summary">
					<?php the_excerpt(); ?>
				</div><!-- .entry-summary -->
			<?php else : ?>
				<div class="entry-content">
					<?php the_content(); ?>
					<?php
						wp_link_pages( array(
							'before' => '<div class="page-links"><span class="pages">' . __( 'Pages:', 'gridalicious-pro' ) . '</span>',
							'after'  => '</div>',
							'link_before' 	=> '<span>',
		                    'link_after'   	=> '</span>',
						) );
					?>
				</div><!-- .entry-content -->
			<?php endif; ?>

		</div><!-- .entry-container -->
	</div><!-- .archive-post-wrap -->
</article><!-- #post -->

Regards,
Mahesh

@gmg-jet: Glad to know you worked it out. Thank you for your appreciation. Let me know if you have any problem. Have a nice day!

Regards,
Mahesh