Gray joined Watford from Burnley last summer off the back of scoring nine Premier League goals for the Clarets.
The 26-year-old has only managed five league strikes for Watford this term, however, and has struggled for football since Javi Gracia arrived at the club in the early stages of 2018.
Gray made just his second Premier League start since Gracia arrived against Newcastle United on Saturday, and the striker has conceded that he would 'have liked to have had more games'.
"I'd like to have had more games - I've not featured much since January - but it's good to get on the scoresheet. Five is not the best number. I'd like to score in every game and hopefully I can do it next week," Gray told reporters.
Watford will bring their 2017-18 campaign to a close away to Manchester United this weekend.