All questions about bl elsewhere erotica

1 - I'm sorry I'm late. I've (been) to the doctor

2 - I'm sorry I'm late. I've (gone) to the doctor

Which one is the right one? Gone or Been?
Honestly I think it's "been" but I dunno

Thanks arleady for helping :)

(for the contest I'm italian and since I'm learning english this is one of the homeworks for tomorrow and I'm not sure which one is right)

All the bl animes (except for hyperventilation)
I have seen are really bad
Why do they choose the worst box to animate