Gronkowski has participated in individual drills for the past two days and watched from the sidelines during team drills. He also worked with quarterback Tom Brady individually after practice.
Gronkowski said he does not have a timetable on when he will take part in team drills.
"If it was 100 percent, I'd be doing every single little thing," he said. "So, no, I'm not 100 percent, I'm working every single day to get to that."
Gronkowski is working his way back from a torn right ACL he sustained on Dec. 8 against the Cleveland Browns. He also missed part of the season coming back from forearm and back injuries.
The Patriots will have their first practice in pads Saturday, and Gronkowski plans to participate by running routes and working on cutting and planting.
"For the last six months I worked my butt off to be here," Gronkowski said. "Cutting on it, making it stronger, I'm here and I'm ready.
"Running routes, being in the huddle, catching balls from Tom Brady, it's a dream come true again. Feels like it got taken away and I feel like I got it back."
Gronkowski, who is 6-foot-6 and 265 pounds, does not plan to alter how he plays.
"I'm going to go full speed and I'm going to keep smashing and bashing everything I do," he said.
Gronkowski played 16 games in each of his first two NFL seasons in 2010 and '11, but a broken forearm limited him to 11 games in 2012 and he played seven games last year.
"I'm preparing myself to my max ability right now and listening to my trainers so I'm ready to go when it comes down to it," he said.
Last season, Gronkowski had 39 catches for 592 yards with four touchdowns. In four NFL seasons, he has 226 receptions with 3,255 yards with 42 touchdowns. He had 17 TDs in 2011.