Warwicks batted on from yesterday and finished on 410 all out with Tony Forst eventually out for 144.
The Warwicks bowlers applied plenty of pressure on the home side. Tahir picked up a brace as did Jimmy Anyon who is a target for Middlesex whilst Neil Carter was 3-42 off 13 overs.
A short while ago Gloucester closed on 228-8 and the match was drawn.