Traveling to Punjab, India: No "GTAPunjab" Exists

"GTAPunjab" is not a real place or transport system. You likely mean the state of Punjab, India.

How to reach Punjab (India):

• By Air: Fly to Sri Guru Ram Dass Jee International Airport (ATQ) in Amritsar, or Chandigarh International Airport (IXC) (shared capital with Haryana). Direct from Delhi, Mumbai, Dubai, Singapore, London, Toronto.
• By Train: Major hubs: Amritsar (ASR), Ludhiana (LDH), Jalandhar (JUC), Pathankot (PTK). Shatabdi/Rajdhani/Vande Bharat express from Delhi (4–6 hrs).
• By Road: NH-44 (Delhi–Amritsar) is a 4–6 lane highway (~450 km, 7–8 hrs from Delhi). Volvo/state buses run frequently from Delhi, Himachal, J&K.

If you meant Punjab, Pakistan: fly to Allama Iqbal (LHE) or drive via Wagah border from Amritsar.