I do not own GX10 nor K10D that shares same electronic and sensor, but I used older cameras like K100D, K200D, K-x and most of my lenses needed fine focus adjustment. When K-x has this possibility, nor K100D, nor K200D and GX10/K10D has it, The problem is that fine focus adjustment is still needed for most my lenses used on these cameras. In this case the help comes from Debug Mode, where you can adjust AutoFocus with chosen lens. This adjustment is global (for all lenses you use on that particular camera). But it really works and is simply doable.
here you find some info:
First disassembly results « Blog
add new data with following inside:
[OPEN_DEBUG_MENU]
Km (v1.10) in the form of the file name is MODSET.464, Boot press the "Delete" button
K2000 (v1.10) in the form of the file name is MODSET.482, Boot press the "Delete" button
Kx (v1.03) in the form of filenames MODSET.492, boot press "Exposure correction button (+/-)" button
K10D (v1.10) in the form of filenames MODSET.421, without the trunk lid compartment SD
Close state.
K10D (v1.20-v1.30) in the form of filenames MODSET.TXT, without closing the trunk lid compartment SD state.
GX10 (v1.10) in the form of filenames MODSET.429 without closing the trunk lid compartment SD state.
GX10 (v1.20-v1.30) in the form of filenames MODSET.TXT, without closing the trunk lid compartment SD state.
GX20 (v1.01, v1.03) in the form of filenames MODSET.454 without closing the trunk lid compartment SD state.
K20D (v1.03) in the form of filenames MODSET.442 without closing the trunk lid compartment SD state.
K200D (v1.00.00.03) in the form of filenames MODSET.445 without closing the trunk lid compartment SD state.
K7 (v1.01) in the form of filenames MODSET.474 without closing the trunk lid compartment SD state.
645D in the form of filenames MODSET.487 without closing the trunk lid compartment SD state.