Gabriel Gonzaga
- Role
- Head coach
- Rank and titles
- 5th-degree black belt, Brazilian Jiu-Jitsu
- Judo black belt
- 2x World BJJ Champion
- Former UFC heavyweight title contender
- Multiple-time IBJJF Masters World Champion
Brazilian Jiu-Jitsu, No-Gi, MMA, women's kickboxing and kids martial arts on Central St. in Leominster. No experience needed.

Head coach Gabriel Gonzaga: 5th-degree BJJ black belt, 2x world champion, former UFC heavyweight title contender.
Answer three quick questions and we'll point you to the class that fits. Every program is beginner-friendly.
Every program is beginner-friendly. Coaches pair you with partners your size and level.
| Program | Ages | Gi or no-gi | Focus | Free class |
|---|---|---|---|---|
| Kids Martial Arts | 4–13 | Gi | Jiu-jitsu for focus, confidence and real anti-bullying skills. | Try it free: Kids Martial Arts |
| Brazilian Jiu-Jitsu | 14+ | Gi (we lend you one for your first class) | The gi program, taught by 5th- and 6th-degree black belts. | Try it free: Brazilian Jiu-Jitsu |
| No-Gi Grappling | 14+ | No-gi: rash guard and shorts | Fast submission grappling in shorts and a rash guard. | Try it free: No-Gi Grappling |
| MMA | 16+ | No-gi | Striking, wrestling and jiu-jitsu, from fitness to fight camp. | Try it free: MMA |
| Women's Kickboxing | 16+ | No-gi: workout clothes | A hard, fun hour on the bags. Learn to throw a real punch. | Try it free: Women's Kickboxing |
Both head coaches have competed at the world level. Beginners get the same coaching as the black belts.




Our kids program uses jiu-jitsu to teach the things school and screens can't. Classes are structured, safe and a lot of fun.
Pick a program. We text you to set a day and time.
Wear athletic clothes with no zippers. We lend you a gi for BJJ.
A coach walks you through the warm-up and the basics. No sparring on day one.
| Mon–Fri | 4:00 PM – 9:00 PM |
|---|---|
| Sat–Sun | 9:00 AM – 12:00 PM |
Full class times by program are confirmed when you book. See the schedule page.
978-502-5682squaredleominster@gmail.com
Students train with us from Leominster, Sterling, Fitchburg, Clinton and Lancaster.
Get directionsNo. Most of our students walked in with zero martial arts background. Every class starts with a warm-up and the basics.
Athletic shorts or pants and a t-shirt or rash guard, with no zippers or pockets. Bring water. For BJJ we can lend you a gi.
Our kids program starts at age 4 and runs to 13. Teens 14 and up join the adult BJJ and No-Gi classes.
Your first class is free. We go over membership options in person after your class, so you only pay for what fits your schedule.