Looks rather like Julia Child. Despite its name, Golden Showers tends to be much paler in color than your bloom, and the petals are more loose.

I have Julia. Not it I'm afraid. My Julia has dark, shiny leaves. These are matte. Smells quite different too. Julia fruity and kind of HT. This one is sweet but kind of "dusty".

Could it be sunny delight? I was just going to post a query on a purple rose that is labelled sunny delight, but is clearly not yellow.

It's not Sunny Delight. Shape and color are both quite different. It's very fragrant and looks a lot like my David Austins. Wondering if I lucked out and got Graham Thomas. It's getting tall and though the color is a lot like Golden Celebration I used to have GC and the growth habit is different.

Would a nursery that was growing roses for big box stores also have something like GT? It wouldn't be possible for a switch to happen unless they were both available from that grower