Using Gallery2's Embed API allows you to seemlessly display your media in any php enabled page on your website as seen in my example below.

Other sample embeds I've made over the years for various sites:

• jennjeff-site.com.php
• lonewolfblues.com.php
• hunterslink.com.php
• tennis.union-oepping.at.php
• smartgallery.php
• victorianfleamarket.php
• stjude.php
• slowly_racing_gallery.php
• parkerwillow.php
• barbaramurrayart.php
• 4-tacres.php
• Gallery.php
• jmb.php
• My Cooliris example
• Example using iframe
• Kinda cool rotator
• Dynamic Frames
• HTML5 Canvas example
• motorcyclemarshal.com.php
• G2 Ajax/RESTful
• Shadowbox Integration

While compiling this list I discarded over 100 other samples where the target site had changed/moved.

My simple embed tool can help you achieve similar results for your site.

Or I have a well commented template which can also be used for the same purpose.
As well as a breakdown of the code.

Lastly don't forget about my mediaBlock, miniSlideshow and E2