The 58 year old musician was found dead in a hotel room on the Costa del Sol in the early hours of Sunday morning.
Thin Lizzy's founding member Brian Downey said he was in "total shock" at the news, adding "He will always be in my thoughts and prayers and I just can't believe he is gone."
His death was confirmed last night on Moore's official website:
"It is with deep sorrow and regret, that we have to announce that Gary Moore passed away while on holiday in Spain last night,"
"Our thoughts are with his children, family and friends at this sad time."
Following Thin Lizzy he had an active solo career and was still touring.