Has /have gone to
Someone has gone to a place but has not yet returned.
He's gone to the bank. He should be back soon.
She's gone to Moscow, she will be back next week.
Where has Eric gone? He was here a minute ago!
Has / Have Been to
someone has visited a place at some time in their life.
He's been to London many times.
I've been to France twice.
Ask Tom for some money. He's been to the bank today.