This is Whittaker's Gold Grapefruit. I have a couple bushels on my tree. It is a very mild tasting and seedy grapefruit and sweetens up before Thanksgiving. I don't mind the seeds as I juice it all. I carted a grafted plant to a St Mary's, GA resident 4 or 5 years ago or more.
I get the occasional white fruit from the tree as well. This grapefruit is propagated in the Houston, TX area.
I'm top-working half the tree to Duncan next spring as I like the flavor better. I planted a couple Houston varieties and have/had mature trees of ujukitsu sweet lemon, golden grapefruit, and panzarella orange. I've since decided I like other varieties better like Duncan grapefruit, Cocktail grapefruit hybrid and Chandler pummelo. BTW I'm finally getting more fruit than I can eat and can top-work a few trees to something I like better.