I have the version 1.1.30682 on Tab2 10.0 and my partner has the version 1.0.19 on Tab2 7.0. Can 1.1.39682 be installed on Tab2 7.0?
You have different versions because you're using different devices and the applications may vary. The gallery belongs to the system which means that it will be upgraded only by flashing a newer ROM or by installing an update.