Not a moment too soon before you manage to catch the gecko as it bites down onto the handle of your hatchet. It holds fast despite not catching any meat, allowing you to swing it into the nearby wall just long enough to stun it once more, and finish it off with another axe to the head. This once was a cleaner cut and nearly decapitated the gecko, finally leaving you with nothing but a few dead lizards. It wouldn't take too long if you felt like skinning and butchering these geckos; hides were always in some demand from traders who knew people who could turn them into clothing and textiles, and the meat was... Palpable enough. Obviously don't eat it raw; gecko meat is highly radioactive and it's a good way to get cancer. But once you grill them on an open flame, they're a decent enough snack and unlike most wasteland critters, the radiation actually helps make sure the meat doesn't catch diseases. 

You'd be able to obtain at least four usable gecko hides, though one was notably missing it's entire head. As for meat, taking the best cuts you find about seven pounds of the stuff all together. There were more bits of the gecko you could eat, but that meat is tough and unpalatable no matter what you do with it. Better off leaving it to the flies. And finally, seemed like one of the geckos was pregnant, because you found one gecko egg. Gecko eggs are hard to cook though due to their high acidic, making terrible omelettes. You've heard of some crazy wastelanders making cocktails with them, but those usually ended with said wastelander dying of some sort of alcohol based poisoning, which may or may not have been made worse by the gecko eggs.

Once you'd finish figuring out what to do with these gecko bits, it was more or less a straight shot to Primm. The town seems almost peaceful from a distance, but you know that it's going to get loud once you make your presence known there. You can see the big old bison from your position too. The fact it wasn't on fire at the moment might be considered a good thing for Primm's state of welfare.