PCB Only Creation without schematic

I would like to make a simple coplanar waveguide for an RF application (basically two layer board with vias). I have the dimensions of the traces, vias and ground planes. Is it possible to draw this up on Kicad Layout manually without a schematic? All the documentation I’ve seen only uses the schematic flow.

My goal is to generate Gerber files that I can submit to a PCB house.

Thank you for any assistance.

sure, just to keep you sane go into Preferences > General Settings > Options area… deselect ‘Enforce design rules when routing’ and maybe also ‘Delete unconnected tracks’.
This way KiCAD won’t care what you do.