It depends on the specific interface you're dealing with. Android user interface components (called '
Views') can be dropped directly into third-party apps, meaning that gestures will work the same way they work anywhere else those interface elements are present (whether in third-party apps or Android itself). In other cases, third-party developers alter the code for these Views to modify or add functionality. In this case, depending on what the developer does, gesture support may be changed, removed, or simply unaffected.
Google has relatively recently adopted a new zoom gesture, which can be used in Chrome, Google Maps, Google+ Photos, and more. It's a standard double-tap on the screen, but before lifting your finger from the second tap you can drag up or down to change the zoom level. At first, the gestures
needed some unification, but they've since been adjusted.