There are so many regional and carrier variants of Samsung's Galaxy S4 flagship that even we can hardly keep them straight, but apparently CyanogenMod hasn't released an official ROM for the white bread, vanilla, Exynos-powered original GS4 before now. But lo and behold, a new build for the GT-I9500 GSM model has appeared on the CM download page. It's a test version of CyanogenMod 11 (Android 4.4) if you're interested.
As you may recall, support for Exynos-based hardware has been something of a sticking point for CyanogenMod and other ROM teams. While the LTE versions of the phone with Qualcomm's Snapdragon system on a chip designs have had plenty of support, the Exynos versions have lagged behind for various reasons. But last week CyanogenMod posted an update to Google+ speaking on the build for the international S4, saying that they were getting close to a release thanks to a hardware donation. A member of the CyanogenMod team said that the first ROM posted yesterday is in fact a nightly build, despite being marked "test," which means that further nightlies (and hopefully M and release builds) will be available soon.
Those of you who have already put a custom recovery on your GT-I9500 can download the test build and flash it now. Don't forget to back up your primary ROM (it's the first release, after all) and grab a copy of Gapps if you want access to the Play Store.