The 18-year-old signed a two-and-a-half year professional contract with the Robins in January.
He is yet to make his senior debut, but is experiencing first team football for the first time with the Southern League Division One South and West Mitres, who are managed by Steve Cleal. They play Yate Town at Kayte Lane on Saturday (3pm).
Cleal said: "Jamal played two games for us and then he picked up an injury in his third. He has a good attitude and pace to burn.
"He is keen to learn and develop and he has improved with every game while learning his trade here."
Lawrence's uncle is former Gloucestershire cricketer David 'Syd' Lawrence, who played five Test matches for England.
Attacking midfielder Harry Williams and left-back James Bowen are both on loan at Conference North Gloucester City until after this weekend, when their deals will be reviewed. The Tigers play Leamington at Whaddon Road on Saturday.
Striker Bobbie Dale has agreed to remain at Cinderford Town until the end of the season, having scored seven goals in six appearance to push boss John Brough's side back into play-off contention in the same division as Cleeve. The Foresters visit Paul Collicutt's Evesham United on Saturday.