Please check synapse version, not GPhoto 2.
Search by entering gphoto in the search window.
If libgphoto2 - 6, libgphoto2 - port12 are installed and each version is 2.5.15, you should be able to use it with Ekos, INDI.
There are three drivers when used with indi or Ekos.
indi-gphoto, libgphoto 2-6, libgphoto2-port12.
These have been registered in the repository in the previous operation. If it can be reloaded at the synapse, it can easily be upgraded with everything applied.
gphoto2 is a tool used on the command line, so you do not need to use indi, Ekos.