For most people, nothing needs installing. Gemini is already the assistant in Android Auto, and the main decision is whether you want it to see your email, calendar and photos while you drive. If you’d rather not, Gemini still handles navigation, calls, music and general questions without them.
Where you live matters for the newer features. Gemini Intelligence started in the US and South Korea, and Google says it is now coming to the UK, along with India and Japan. Canada isn’t on that list yet. Google also notes that these features are limited to certain countries, languages and adults 18 and over, and that heavier use may need a paid subscription.
Cars with Google built-in, where Android runs on the car’s own screen without a phone, are getting Personal Intelligence over the coming months. Google says personal answers there only appear when the driver is in the car with their phone connected.