Make sure that you have sideloaded the latest apk for google search. Also, if you want to be able to simply say "OK Google...call Mom", You will have to load the latest Google Now Launcher apk. I downloaded both by using the google chrome extension that allows you to download the apks to your PC from the Google Play website (awesome tool!).
The microphone sits directly to the left of the space bar in the AOSP keyboard.
Ok a couple things. I am pretty sure I have the latest apk installed on the gear for google search as I did this step a few days ago. Can you confirm you version to me?
I understand the being able to say "Google Now" bit. I've tried a few external sources to obtain the Google Now Launcher app and everytime I try to install it on the Gear, I get a parsing error, unable to install. I found a KitKat Launcher which sorta does the same thing. Google Now Search still thinks I'm needing Internet and even when connected to the Internet, a "Call Mom" voice command brings up search results instead of performing the actual call task.
I finally installed another keyboard: Swiftkey, and am now able to get a voice microphone offline using the browser as a test and it works to dictate text, however, when in "Google now Search", and I even try bringing up the keyboard, that voice microphone is missing.
I'm Stumped.