The term Doxa is an ancient Greek term (δόξα) that comes from the verb dokein (δοκεῖν), meaning 'to appear, to seem, to think, to accept. It is a common belief or popular opinion. In classical rhetoric, doxa is contrasted with episteme ('knowledge').
Between the 3rd and 1st centuries BCE, the term picked up an additional meaning when the Biblical Hebrew word for 'glory' (כבוד, kavod) was translated by the Septuagint as doxa.
When it comes to Geocaching I don't think I've ever heard the word Doxa linked to it. But a camouflaged cache could be seen as doxa. To seem or appear like something else. To look at it and not realise you are looking at the cache or you accept that it's not the cache. And finding that camouflaged cache could give you a feeling of doxa. A feeling of glory.