The 26-year-old had an enormous impact as the Black and Whites tied down their pass to the Italian first class last month.
Spezia reached Serie A for the first time in history, becoming the latest team to qualify after Benevento and Crotone.
And the Ghanaian-Italian football star is anticipating tough matches in his debut season in the Serie A where Spezia travel to Udinese.
"The coach was very important because he immediately gave me confidence and taught me a lot on an offensive level," the Ghanaian said
"It was really fundamental for me and my teammates: the important thing for us is that we must always keep the group because it has helped us so much this year.
"We know that Serie A will be a tough and tough championship, plus for many of us it's the first ever, so we can't wait to play."
Gyasi, registered 5 assists and plundered 8 goals in 33 matches in all competitions for the side last term.