Ironically the concert will be staged in a venue that Moore hated — the Waterfront on the banks of the River Lagan.
Moore (58), who was raised only a few miles from the Waterfront, died on Sunday after suffering a massive heart attack at the start of a holiday on the Costa del Sol.
Moore was a member of Thin Lizzy for three spells after teaming up with Dubliner Phil Lynott, who died 25 years ago.
Gary organised a memorial concert for Lynott in Dublin in 2005 but decided against joining ex-members of Thin Lizzy when they revived the group for a tour of the UK, which arrives in Belfast next Wednesday night"