We have no limits for integration of our gallery into wordpress themes. We tried to implement our gallery the way to make it work stable to avoid conflict with another plugins and themes. In the case if you have some problem with our gallery functionality if you have some notices, warnings or any type of the conflict with another plugin or theme please drop a line here. We’ll do everything possible to help you and sort problems related with our gallery plugin.
Yes, our gallery have widget which you can find in your website widget section in admin area. If you have some particular question related with gallery widget functionality please let me know.
Actually we don’t have any limits for usage of the gallery on page with oscommerce, woocommerce or other such type plugin. Only one note, unfortunately, for now we don’t have any special add-on for woocommerce plugin.