

These gerber files are the same as the ones in the 0406Gerber/zip file 

I am currently using the company https://jlcpcb.com for producing PCBs

If you go to the company and select the quote button.
Then upload the zip file and you will get a quote 
and you will see the gerber files that have uploaded.

The Filenames needed for  jlcpcb are:-

Boardname.GKO Board Outline
Boardname.XLN Drills

Boardname.GTO TOP Silk
Boardname.GTS TOP Mask
Boardname.GTL TOP Copper

Boardname.GBL BOTTOM Copper
Boardname.GBO BOTTOM Silk
Boardname.GBS BOTTOM Mask

RiscPCB will produce the correct filename for the selected layer apart from
the board outline to produce an outline select an internal layer eg Inner1
Make your outline using the line track tool
Make a custom gerber output for Inner1
Save the file as Boardname.GKO

