So going with how game pass ultimate works, it adds whatever time you have left and then stacks the same amount on top
For example, if in total I have 6 months of gold + 6 months of game pass then I will have 12 months of ultimate + another 12 months for joining. Meaning 2 years worth of Ultimate.
In your case you have 2 months of gold + 8 months of game pass. That will combine to 10 months plus another 10 they give you. So your subscription would expire roughly around February 2021
Wait, so does this apply if you're only subscribed to GP? I only have GP right now, and not gold.