First step
Go to GPO ( Government Post Office ) or Main Branch or short branch of Bank. You can reach any commercial bank in Pakistan. What all you need to do is taken a print copy of your bill and payment of sui gas bill and give it to cashier or staff officer of the bank or GPO. Staff officer will take charge of your bill payment and give back your printed bill receipt and your bill payment is done with this easy process.

https://suigasebills.pk/

Which Private Banks Sectors will Taken and Accept Bill Payment
Here are 15 Private Banks that will accept bill payment in hand:
National bank Pakistan ( NBP )
Bank 0f Khyber ( BOK )
Habib Bank Limited ( HBL )
Askari Bank Limited ( ABL )
Meezan Bank Limited ( MBL )
Soneri Bank Limited ( SBL )
Muslim Commercial Bank Limited ( MCBL )
Bank Islami limited ( BIL )
United bank Limited ( UBL )
Habib Metro Bank Limited ( HMB )
Bank Alfalah Limited ( BAL )
United bank Limited ( UBL )
Bank Al Habib Limited ( AHL )
Bank of Punjab ( BOP )
Standard Charted Bank Limited ( SCBL )
gas bill online check by name

sui gas bill online check

sui gas bill

gas bill online check

sngpl online bill check

sui gas online bill

 
These banks will accept your bill payment at bank official timing from 9 to 5. Banks will also accept bill payment even after due date you just need to pay your late bill payment fine.
Second Step
This step and process is quite easy as compared to first step. In this process you do not need to go any where outside, Just need internet connection and banks apps to pay gas bill online check: Here is the complete process and step by step guide:
Paying Online Via Banking Apps
You can pay your bill online with very easy and stable setup as follow:

Just go to Banking apps
Click on the bill payment Option
Select your bill payment Type
Click on the send or Ok button to pay in Full.

Every bank has its own banking apps which are very easy to use and their layout is very stable and quite simple for customers. Bill payment can also be done by the local payment gateway and they are verified by the Gov.
Easypaisa (EP)
Jazz Cash (JC)
Upaisa (UP)
There are the local payment operator works originally and they are verified by Pakistan Gov. You can use these payment gateway to pay your bill payment in Full as well as in Half (Kist). Please make sure you have valid mobile accounts for this process.
The process for these E wallet System is Different accordingly to their layout. Please Understand the system below of every E- Wallet application and Process. We attached every details with screen shorts to better and easy understand.