Calling G2 logica from another page

I know there's a lot of documentation out there but I would like someone to point me in the right direction. I support a few client's web pages where they have pictures of houses. Right now I just statically build the pages and manually insert the pictures. I've always wanted to be able to have in those pages bigger pictures that you could cycle through and/or have a slideshow. I know this would take me down the dynamic route and was thinking of maybe adapting G2 to work for this.

Examples of the sites: http://bradhouses.com and http://bradrents.com

So do you think it would be easier to try to call G2 code from within a page of a house or just adapt G2 somehow to actually serve the whole site?

Andrew