Google is rolling out a new feature that lets you arrange the apps in the way you like them. In the web-based version, you can now customize the App launcher to show your favorite products at the top. To put the products in the order in which you like them to appear, simply drag and drop them within the menu. If you’d like to add an app which is not in the list, click “More” at the bottom of the menu to show additional Google products and you can then drag the desired app to the top. To add the products that do not appear in the “More” section, just go to the product you’d like to add and open the App launcher, there you’ll see a prompt to add it as an app. Google says that it will be rolling this out over the next couple weeks.
SOURCE: Google (Google+), Google Support