Yes thera are no problems at all you just have to do it! If you look at our package for Relate+ or create+ we have samples of imagegalleries. But you can do one your self just the way you like it with the style you like.

Here is an example of what you can do: http://www.smashingmagazine.com/2007/05/18/30-best-solutions-for-image-galleries-slideshows-lightboxes/

and here are our demosites where you can find galleries:

http://create.episerver.com/en/ImageVault/

or 

http://relate.episerver.com

shoud say this site is build on our community platform!

But there are many ways to implement an image gallery! :)

If the only thing you need is a picture gallery you can check out the module on EPiCode, https://www.coderesort.com/p/epicode/wiki/PictureGallery. It has functionality for auto thumbnail, auto preview and download of full size picture. In addition you have the option to display Slide show.

 As a side project the Picture Gallery also support upload from Picasa, see https://www.coderesort.com/p/epicode/wiki/Picasa2EPiServer.

Good luck!