Charlie Wilson It's All of Us Or NO GAP BAND ... And One of Us is Dead

1/22/2016 6:31 AM PST

Charlie Wilson fired back at his brother Thursday, saying his bro can't use the name Gap Band unless 3 members reunite ... which is impossible.

Our photog got Charlie at LAX and asked about Ronnie Wilson's lawsuit, claiming Charlie is blocking his efforts to book gigs with his new band and the old name.