Thank you for your reply 🙂
We did manage to test it yesterday and it works perfectly : exactly what we were looking for !
We didn't have to install any Hotfix though, CloudGuard Controller was already enabled on the Mgmt side, we just had to configure the Datacenter Object. On the gateway side, we just had to enable IA Blade API and that's it, we can use dynamicly learn EPGs from ACI in our policy : amazing.
When it comes to CloudGuard, i've digged a bit more.
If I understand correctly, there is CloudGuard IaaS which basicaly represents a virtual Security Gateway with some cloud feature (auto-scaling, etc). On the other side, there is CloudGuard SaaS which is a completely different solution which enables security at the Service level (O365, G-suite, etc).
Is that correct?