Group Training · Durham, NC
Random workouts
end here.
Lose the weight and gain strength with a 4-week rotating system: Lifting, Cardio, Endurance, Recovery. Coach-led classes of 5 to 14 keep you accountable, and every week builds on the last.

TRY 2 WEEKS FOR $79
8 sessions. Any class times. No contract.

The 4-Core Method
One month.
Four phases.
Most group training programs are built around one thing: cardio or weights, rarely both. That's how you plateau and burn out. The 4-Core Method rotates the focus weekly so nothing gets left behind, and your results compound instead of stalling.
Lifting week at GTA Fitness
Week 01
Lifting

Heavy weights, low reps. Barbell and dumbbell work with hands-on coaching every set.

Cardio week at GTA Fitness
Week 02
Cardio

Extra cardio like running and ski-erg intervals. Timed workouts with short breaks in between rounds.

Endurance week at GTA Fitness
Week 03
Endurance

AMRAP sessions: as many rounds as possible. This is the week your stamina shows up.

Functional week at GTA Fitness
Week 04
Functional

Still a full workout, just a different gear. A Reset for your body before the cycle restarts.

WHAT WE DO

At GTA Fitness, group training is what we do best. 


Group training at GTA is all about showing up, feeling supported, and getting real (and sustainable!) results. We'll take care of the programming so all you have to do is show up, give it your best and watch your results stack up week after week.

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Train Smarter.
Recover Stronger.
Repeat.

TRY 2 WEEKS FOR $79

WHAT TIME WORKS FOR YOU?

Group Class Schedule

GTA Fitness — Class Schedule
This week is Loading...
Mon
Leg Day
Tue
Back Day
Wed
Chest Day
Thu
Leg Day
Fri
Full Body
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Download our app for class times and easy bookings!


AVAILABLE ON THE APP STORE ➜

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Meet Your Coach

JONATHAN GRAMBY


Jon is more than just a trainer – he’s a guide for those ready to take control of their health, elevate their mindset, and build lasting strength. Based in Durham, NC, Jon’s journey from Elizabeth City to fitness coaching is fueled by one thing: his passion for helping people unlock their potential. With an M.A. in Wellness Promotion and certifications as an ACE Certified Personal Trainer and Fitness Nutrition Specialist, Jon combines expert knowledge with a down-to-earth, no-nonsense approach that gets results.

Whether you're focused on weight loss, building strength, or transforming your life, Jon doesn’t just help you achieve physical goals. He empowers you with the tools, mindset, and confidence to make sustainable changes. His mission? To give you the independence to live a healthier, stronger life—without relying on temporary fixes or cookie-cutter plans.

Jon’s clients love his ability to connect, motivate, and push them past their limits. Every session brings energy, laughter, and progress. He knows that every person’s path is unique, and he’s here to walk with you, one step closer to your goals—while making the process fun, challenging, and transformative.






DON'T TAKE OUR WORD FOR IT...

See what people are saying about GTA...


★★★★★
55 lbs lost in 1 year

"GTA is more than just a gym; it's a community. Coach Jon doesn't ask for perfection, he just asks for consistency. I gained accountability partners, confidence, and a dedication to a healthier lifestyle."

K
Kiya E.
GTA Member, 1+ year
★★★★★
Signed up after one class

"Tried out GTA after a friend's referral, and I'm so glad I did! The energy was high from the start, and Jonathan did a great job leading the class and pushing us individually. The workout was tough in the best way. Loved the community vibe. I just signed up!"

G
Google Review
Verified, first visit
★★★★★

"As a former collegiate athlete, what makes GTA special is that I can release the need to focus on performance and align with community and consistency. No yelling, no exhaustion. Just effort, pace, and celebrating collective wins."

N
Nish L.
Former Collegiate Athlete
★★★★★

"The staff and people are friendly, knowledgeable, and always willing to help if you need tips on form or equipment. I especially appreciate how welcoming the environment is. Whether you're a beginner or a seasoned lifter, everyone fits in."

G
Google Review
Verified member
★★★★★

"GTA Fitness is a safe, friendly, yet competitive space. The community is encouraging, joyful, and incredibly authentic, values that come directly from Coach Jon. This membership is worth every penny and then some."

C
Charity L.
GTA Member
★★★★★

"Great community, good ability to adjust workouts for fitness levels, injuries, etc. Challenging and fun!"

G
Google Review
Verified member

READ MORE REVIEWS

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STOP WAITING, START HERE.
Try 2 weeks
for $79.

You may have tried other gyms. Random workouts, no real structure, and nothing that actually builds on itself. GTA is different: a coach-led program that progresses week to week. Come experience the difference.

1
Book your first class
Pick any time on the schedule. Your $79 covers up to 8 sessions over 2 weeks.
2
Show up. That's it.
Your coach runs everything, and every workout scales to your level.
3
Decide with real info
After 2 weeks inside the system, you'll know if GTA is your gym. No pressure either way.
8 coach-led sessions
Any class times
Classes capped at 14
No contract, no auto-enrollment
Start My 2 Weeks Takes 2 minutes to sign up.