Mine is VW 14101473, FW v 1.25
One of the first things I noticed with GX200, coming from R3+R4 experience, was the accuracy of the Infinit Focus, not needing to set the Macro Mode like I was used to. So this problem made me curious
I did a quick comparison between all the AF modes (except Manual), and also between each one + Macro. Macro mode superimpose every Focus mode in a similar way. First run was made in P Mode, with F 8.9; 1/400, and some undexposed shots. Turning to A Mode, with F 5; 1/1000, I've got much better results. BTW, all done with a mini tripod and Camera Shake Correction Off.
Conclusion: no problem with AF in the Tele End.
Now, after the test, while posting this I did another comparison between the center and marginal areas (thanks to Faststone Viewer comparison mode). So I found another problem that puzzles me: the center area is very similar, but the left and the right areas are different. Where it's better with Infinit is worst with Macro, and where's better with Macro is worst with Infinit... it happens the same between Macro and the other modes (except SNAP, of course), and there's no difference between all the shots taken with Macro. So the lens behaviour seems consistent with this mode but not between modes?
First one set to Infinit, second with Macro (100% crop):