Hall joined QPR from Premier League outfit Tottenham Hotspur in the summer of 2015 on a two-year contract.
Ramsey, who was sacked as the Rangers head coach earlier this month, has spoken highly of the 24-year-old central defender.
“I think Grant was a real positive for us during my time at the club – he was excellent,” the 53-year-old told The Brent & Kilburn Times. “He was very good value for money.”
Hall, who was on the books of North London outfit Tottenham from 2012 to 2015, has been playing well for QPR this season.
In 12 Championship appearances this campaign, the 24-year-old has created two chances, has a pass accuracy of 67%, and has won 46 headers, four dribbles and six tackles.
QPR, who got relegated from the Premier League at the end of last season, are 15th in the Championship table at the moment with 20 points from 17 matches.
The London outfit are just five points above the relegation zone, and there is a chance that they could miss out on a top-six finish in the league this campaign.