Yes, Geeni bulb & other Geeni devices support also google home & Alexa. Open the google assistant app & go to control then you can use these commands listed below:
1.**Say "Hey Google", then... **
*) To turn on/off a light, say "Turn on <light name> ".
*) To Dim a light, say "Dim the <light name> ".
*) To Brighten a light, say “Brighten the <light name>".
*) To Set a light brightness to a certain percentage say "Set <light name> to 50%".
*) To Dim/Brighten lights by a certain percentage say "Dim/Brighten <light name> by 50%".
*) To Change the color of a light, say "Turn <light name> green".
*) To Turn on/off all lights in room say “Turn on/off lights in <room name>".
*) To Turn on/off all lights say “Turn on/off all of the lights”.
2. Verify that your Geeni lights are linked to the Google Home app. In the upper right corner of the Home screen, tap devices.
3. Have you tried renaming lights? that way you can control them individually.
If Google Home isn't recognizing the turn on command then may be it doesn't know which light to turn on. For example, as opposed to saying "Hey Google, turn on lights," you can now say, "Hey Google, turn on bedroom”.