The Tokyo Olympic middleweight champion received 60-54 following six two-minute rounds within the welterweight division.
Former kickboxing world champion and ex-Wales worldwide footballer Value began confidently from the primary spherical.
Gudstensdottir took some time to get going and was reliant on a number of huge pictures, however Value was dominant all through, utilizing good hand pace to take the bout to the ultimate spherical and declare victory.
Value paid tribute to her supporters, and particularly her grandparents.
“Undoubtedly (it was every thing I hoped for),” she informed Sky Sports activities.
“I simply needed to loosen up whereas I used to be in there and never rush my work, get six rounds underneath my belt and let’s go once more.”
She added: “(It was) completely wonderful. I’d prefer to thank everybody who supported me, who purchased tickets to come back and watch me, and I actually loved the ring stroll as nicely, my first one, so I’m buzzing.”
Value’s grandmother is because of watch the combat within the morning and when requested for a message, Value stated: “Simply that I really like her and if it wasn’t for her and my grandad then I wouldn’t have achieved something in my life.”