functions.php

<?php
// Don't include the <?php, only here for styling the gist

function be_move_grid_image() {
	// First, we make sure we're in the grid loop.
	if( ! apply_filters( 'is_genesis_grid_loop', false ) )
		return;

	// Move Featured Image in Genesis 2.x
	remove_action( 'genesis_entry_content', 'genesis_do_post_image', 8 );
	add_action( 'genesis_entry_header', 'genesis_do_post_image', 4 );
	
	// Move Featured Image in Genesis 1.x
	remove_action( 'genesis_post_content', 'genesis_do_post_image' );
	add_action( 'genesis_before_post_title', 'genesis_do_post_image' );


}
add_action( 'genesis_before_entry', 'be_move_grid_image' ); // For Genesis 2.x
add_action( 'genesis_before_post', 'be_move_grid_image' ); // For Genesis 1.x