Will I lose strength after gyno surgery? Will it affect my Powerlifting routine?

No, you will not lose strength after gynecomastia surgery.  This procedure involves "adjustments" of the tissues superficial to your musculoskeletal structures. Best wishes.

Thanks for your quesion.When having gynecomastia surgery you are not cutting any aspect of the pectoralis major muscle, which is the main chest muscle.  You are simply removing the breast tissue and the breast bud.  You should be able to return to power lifting in 4-6 weeks, gradually increasing the weights to your pre-surgery weights.Thank you