I have played safe for years. I stayed with only black shoes and boots. But I have since added a pair of brown shoes to my stable with matching brow belts

My Blundstone Boots are my favourite pairs right now. They are just so comfortable. I have worn them almost every since I got them last summer. EXcellent day to day boots.

Your Grey Shoes whoul work well in general, because I can't see the shoes clashing with the Gunn Tartan. Just carefully match your Hose with the shoes and shirts, you are going to have 1 smart outfit.