You can find all these apps in a single downloadable zip package. So, you have to manually download and install the GApps.zip onto your device to get those apps. However, the custom ROMs like CyanogenMod and AOKP do not include the Google Apps package. All stock ROMs come with Google Apps included within. Google Apps for Android include a wide range of apps for Android devices by Google. You can download latest GApps for Android 4.4.4, 4.3 or 4.2.2 here.
