I just brought Game Pass thinking it came with Gold, If I convert to Ultimate will I have...

If game pass ultimate is purchased, ANY gold is automatically converted to game pass,so I dont think its residual gold sub

You'll have to pay the 14.99, but the Game Pass you bought will be converted to Ultimate and you'll get the month you paid for on top of that.

I have cancelled my Ultimate Pass and I'm happy with 12 months Xbox Live Gold membership I was able to purchase after the Ultimate Pass had expired. My original concern was whether or not I could just buy Gold or would it convert to Ultimate Pass after
previously upgrading to it, as I no longer wanted to use Ultimate Game Pass and just have Gold.

I agree with Wadski in that if you currently just have a Xbox Gold subscription, you are better off adding additional months to you Gold Subscription or Game Pass first before you convert to Ultimate. If it is your first time converting to Ultimate, the
total months of Xbox Gold plus the total months of Game Pass will be added as your new Ultimate subscription. 12 months of Gold + 3 months of Game Pass will convert to 15 months of Ultimate. If you purchase 3 months of additional Gold membership then you will
get 18 months of Ultimate. Therefore only purchase Ultimate after you convert your subscription.

I think its worth converting your Gold to Ultimate BEFORE adding three months of Ultimate to it.

Also, if you have previously used the conversation to Ultimate offer then you want be allowed to use it again.

The option to convert gold/game pass to Ultimate is not tied to an offer. It's just how it works. That has not ended and won't end if you bave already done it in the past.