The Gibbs tartan is actually a variation of the Buchanan Old sett (Gibbs, Gibson, and other variations of the name being septs of Buchanan). So, if you want to see how it might look in a kilt, try and find pictures of kilts in the Buchanan Old tartan.

I can at least direct you to pictures of that tartan in actual cloth, to give you an idea. Here are images of Lochcarron's Strome cloth in the ancient...


...and the weathered colors.


I've never, to my recollection, seen this particular tartan woven in the modern colors. Personally, I really favor the weathered tones in this particular sett.

Aye,
Matt