Quick question for everyone: If I'm designing maps in Gimp - with the end goal to sell as PDF's, but I also want to make them available for print on demand - should I be base painting in CMYK with Gimp? Or should I just do it RGB and then convert to CMYK?

Also - Does anyone here use Gimp who might be able to tell me what they draw/paint in and what the right option is? I'm still learning all the ins and outs here Thanks!