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My link is for on the device itself, the second link is for setting up via your PC/Mac.

Both links work, you just missed the bit for my link where I said, goto it on your iOS device
 
I just updated to iOS6 and my multiple calendars (all from one google account) don't show up.
Only the main calendar is displayed.

Any tips?

Multiple Google Calendars work great on my SGS III, oops wrong device... we're talking iPhones here. :)

I used to (past tense) use them successfully when my iPhone 4s was my primary smartphone before acquiring my Galaxy S 3. I don't have the link handy, but a search of www.Lifehacker.com and you should find it.
 
My link is for on the device itself, the second link is for setting up via your PC/Mac.

Both links work, you just missed the bit for my link where I said, goto it on your iOS device

No, I tried this on the iPhone 4 itself. It didn't work.
I tried the second link on my device too, and that worked.

But thanks anyway! :)
 
Works for me, maybe its only for exchange accounts on the device.

Glad you got it working anyway.
 
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