Doesn't CDMA actually have less frequencies than GSM?
Frequencies for ALL technologies (GSM, UMTS, CDMA1X, EVDO, LTE, WiMax) are where the various governments allow them to be, e.g., all over the damn map. 400, 450, 700, lower 800, higher 800, 900, 1.2, 1.5, 1.6, 1.7, 1.8, 2.2, 2.5 and probably more.
Nothing is "standard" - that was just a pipe dream by some bureaucrat who had no idea of what was already existing outside of his domain.
Sure, there are more common bands that are used widely, but expect the unexpected and you'll be all set.
Now, the problem with all of this is that making a mobile or handset that hits all of the bands is always going to be a compromise technically, or it will just be too big and too expensive.
If you filter out the smaller markets and smaller operators then things get a bit clearer, but certainly not clear. Some of those oddball bands I mentioned above are certainly not in wide use, so they probably could be ignored - but if you're a user of one of those bands, you won't be happy with that, will you?