If you want to install Gallery2 on your account at SiteGround, you can refer to our tutorial on the subject:
http://hostlantern.com/clients/knowledgebase.php
In addition, you can request a free installation by posting a ticket under:
Customer Area -> Support tab -> Open a Support Ticket -> Script Installation
You need help with an application?hostlantern is specialized in hosting and supporting more than 200 scripts. Sign up for our web hosting services and let us help you with your application, 24/7!