It depends on your long-term goals. 50 pushup is a strength-endurance feat, and necessarily entails not using maximum effort on each rep. Personally, the pursuit of such feats isn't something I enjoy so I stopped at 20 reps, e.g., when I was working on pullups, and did them holding a 20 lb dumbbell between my feet because I like to train at that level of effort and I thought this to be a reasonable goal for myself, which it was. Could I have gone for 25 or 30 reps with bodyweight only? I am content never to find out. Perhaps this is because I spent a couple of decades running and cycling, and in those 20 years I got enough endurance training to last me a lifetime.So, it's again a success. But I now wonder:
Have I plateaued with GTG push-ups, or should I keep going? I would like to increase my RM to 50 or similar, and I really enjoy the GTG approach.
To answer your question, you certainly could continue with GTG.
-S-