some drone remote controller uses GFSK modulation and wifi also uses GFSK . so that it seems that both signals are almost same. so that could not classify correctly due to which wrong classifications occur.

Drone remote controller uses frequency hopping spread spectrum, dont know how to track drone signal only among wifi interference in order to capture features of drone signal.

I use FFT method for this, but this only gives frequency and corresponding signal strength.
I need help on how to find the unique attributes (features) to classify drone RF Signals from others signals.

 

Drone remote controller uses frequency hopping spread spectrum

You need to know the frequency-hopping sequence the controller uses to recover the drone signal.