The Ghanaian, who spent almost three months on the sidelines shortly after a club record transfer from Swansea City in summer last year, scored to win a point for the Hammers in the 1-1 away draw at Watford on Saturday.
The match was his first appearance since scoring twice to help Ghana reach the semi-finals of the recent Africa Cup of Nations in Gabon.
"I was so pleased to see Andre back among the goals," Gold told his club's official website.
"He is our club record signing and is a very good player.
"He looks like he is getting back to his best form following a frustrating period through injury and we hope that can continue.
"He was so unlucky to get injured in the opening Premier League game against Chelsea but he has regained full fitness and took a lot of confidence from his successful run at the Africa Cup of Nations."
Ayew has two goals to his name in 13 league appearances for the Hammers thus far.
Last season, he netted 12 times in 34 topflight outings for Swansea.