Gordon returned to the team Saturday following a three-weeks-plus absence connected to his recovery from drug and alcohol addiction. The former Pro Bowler has only been allowed to attend meetings and watch from the sideline since returning.
The Browns, the NFL and Gordon's doctors all will be involved in deciding when Gordon is cleared to return to practice.
Following the team's final training camp practice on Tuesday, Jackson said the team is making sure Gordon is "in great shape, in a great place" before he practices.
Gordon won't play in Thursday's exhibition against the Philadelphia Eagles. Jackson said his goal is for the 27-year-old to appear in the preseason finale on Aug. 30 against the Detroit Lions, and ultimately play in the Sept. 9 season opener against the Pittsburgh Steelers.
The Browns' next practice is Saturday.
The Associated Press contributed to this report.