The GoView creates a standard .NET Tooltip, which you can access via GoView.Tooltip. So, you can set any available settings through that.
I set it to 10,000 and got a 10 second tooltip.
But, if I set it to 300000, I get the 5 second default. So, I’m guessing that is out of range. Also note that setting AutomaticDelay sets AutoPopDelay… see the MS documentation.