If you follow the steps I included above, you should be able to import to kiCAD. Just remember since most of these paper circuits are one-sided, and most board houses are expecting at least a two-sided design if you do not include this relevant layer nothing will be routed on the underside of the board. I usually copy layer 1, mask 1, and paste them as layer 2 (.gbl), mask 2 (.gbs)
You can then import the gerber files into kiCAD using gerbview. To work properly you will need to import layer 1, layer 2, mask 1, mask 2, silk 1, silk 2, and aux layer. Once you’ve imported them select export to Pcbnew and follow the output diagram below.
You should see new .kicad pcb file containing all the layers. I have noticed some weirdness importing from Osmond. It has trouble reading some footprints, for example all the through hole pads appear as vias. I haven’t found a work around for this yet. I found if you include the original drill.txt from osmond in the zip when uploading it to seeed/jlcpcb etc. it will route and plate the holes properly
