How can i imported divs to garmin dive app

I have the same question, though I have been using Subsurface with a Cressi Giotto.  I started manually logging my dives last year in the Garmin app in anticipation of getting a MK2i and wanting to consolidate to the Garmin Dive App, which its self is OK for my purposes, but I would like to save my old dive profiles there ass well, not just the general dive info.  So far in my searching, I have not found that this is possible.

I wrote an open-source application for converting Suunto dive logs. No guarantee that it will work for you but you can give it a try.

github.com/.../SdeToFit

Did anyone tried to synchronize Garmin Dive LOG with PADI Dive LOG available on PADI web site?
Is it even possible?

It's possible, if you really want to. Here's the process I used:

Import dive logs from old device to Subsurface (Suunto Zoop, in my case).

Export from Subsurface to CSV

Use the Garmin FIT SDK to encode to FIT files. This is the hard and complicated part, if you're not familiar with some level of programming

Upload the FIT files through Garmin Connect online (on a computer)

If this sounds horrific, that's because it is. I ended up just using Subsurface as my 'master' dive log. By default, Subsurface can easily import the .FIT files that Garmin generates, if you put them into a folder on your PC. I ended up making a little script that pulls new dive activities from Garmin Connect and adds them to the Subsurface folder, but you can do without that.