After trying the Gboard keyboard for about a week, I’m a bit disappointed with it. I had first thought its multi-language implementation was going to be like SwiftKey or iOS 10; the ability to have two languages at the same time. No dice, it works like current iOS 9 where you switch between the two languages.
The way it works kinda forces you to have Gboard as the only keyboard configured, otherwise you have to go through all keywords before arriving back to the second language.
I set it up as my only keyboard, but the speed improvements never came. It was useful to have Google search right from the keyboard, but not enough overcome my slowness typing either it.
As I wait for iOS 10, going to give SwiftKey a try again. My friend Christian likes it, a Microsoft is probably working on some cool stuff for it.