The picture was purportedly taken in Mexico in 1886, probably at, or very close to, his negotiated surrender to/through 1st Lieutenant Charles Gatewood. Geronimo's rifle, as well as the one in the hands of the man to his right, appear to be percussion guns, as you can clearly see the drum bolsters and nipples. This seems a bit odd at this point, as cartridge repeaters had been around for a quarter of a century by now, and, being in many scuffles during this period, it seems almost a dead certainty Geronimo would have managed to arm himself with a repeater. Both men are wearing belts, but it can't be definitively seen in the picture if they are indeed cartridge belts.
Sometimes the squeaky wheel gets replaced...