Gallery function on Portfolio pages missing?

Are you talking about prettyPhoto?

It’s deactivated by default, to activate it you would just need to uncomment it and then comment out the code above it.

Here is the code I’m referring to –

/**
 * Adds Featured Image and links it to the Post
 *
 * This is the default post image which links to the post it represents when clicked.
 *
 * @author Wes Straham
 * @since 1.0.0
 */
add_action( 'genesis_entry_header', 'adapt_portfolio_do_post_image' ); 
function adapt_portfolio_do_post_image() { 
	$img = genesis_get_image( array( 'format' => 'html', 'size' => 'portfolio-thumbnail', 'attr' => array( 'class' => 'alignnone post-image' ) ) ); printf( '<a href="%s" title="%s">%s</a>', get_permalink(), the_title_attribute('echo=0'), $img ); 
}

And then right under it the prettyPhoto code –

/**
 * Opens Featured Images with prettyPhoto Slideshow
 *
 * This code makes the post image open up in the prettyPhoto slider.  To use the prettyPhoto feature, "uncomment" the code below and "comment out" the Featured Image code above this to prevent duplicate images from appearing.  
 *
 * @author Wes Straham
 * @since 1.0.0
 */
/*add_action( 'genesis_entry_header', 'adapt_prettyPhoto_image' );
function adapt_prettyPhoto_image() {
    $img = genesis_get_image( array( 'format' => 'html', 'size' => 'portfolio-thumbnail', 'attr' => array( 'class' => 'alignnone post-image' ) ) );
	printf( '<a href="%s" rel="prettyPhoto[gallery1]" title="%s">%s</a>', genesis_get_image( array( 'format' => 'url', 'size' => 'Portfolio Full', 'attr' => array( 'class' => 'alignnone post-image' ) ) ), the_title_attribute('echo=0'), $img );
}
*/

You would need to comment out the first block of code and then uncomment the second block of code (which is for the prettyPhoto)

Oh, I thought you were talking about the prettyPhoto. So are you referring to the default WordPress Gallery (that comes with WordPress)? If so, then the theme shouldn’t affect that, so I’m not sure what happened.