Форуми / Cotonti / Extensions / Gallery script integration

While you can use PageAvatar and PageMultiAvatar to turn pages into galleries, the request for a user gallery plugin is still quite popular.

I'm currently considering a bridge to 3rd party gallery software as a possible solution. The most popular PHP gallery is this one, but G3 has no ways of integration with 3rd party software apart from REST API, which is more suitable for 3rd party sites than with your own one. So, I'm checking if Coppermine or Piwigo can be integrated with Cotonti.

I wonder how far such an integration should go. To be precise I'd like to ask 2 questions to the community:

1. Would you like to use a 3rd party gallery script such as G3/Coppermine/Piwigo together with your Cotonti site?
2. What features do you need from such an integration?

The first obvious feature is that a user should be able to login in both systems with one account.