I processed two cashouts from GT Bets. One a wire for the max and one a bitcoin transfer.
The wire took place within one week. The bitcoin cashout took place next day.
I deposited to GT Bets via P2P and they did allow a free cashout via bitcoin despite not funding with bitcoin.
My experience with GT Bets was a good one and I will deposit there again if they will still give me a good bonus come football season.