The Gatekeeper is located in the 2nd Wiki and gives you the last code segment after answering all questions.
PS: Every wrong answer will be punished with a hack or just the text "You are at the wrong place kid!".

The questions are not always 100% identical to the content inside the game + they could change after every update:

At which day did the Mobile Rat arrive on zeroDay?
- 042116
How much is an AK-47 on hot burners?
- $800
What is the name of the pastor that wants to purge the world of the heretics?
- Donald
How much does it cost to access the shadow web?
- $200
Which one of these drugs does Family Drug Shop NOT sell?
- LSD
A confession reveals that this individual desires to be kidnapped and raped. How old is this individual?
- 22
Who is the author of Butchering the Human Carcass for Human Consumption?
- Bob Arson
Who has the most expensive AR-15?
- The Bunker
What is the minimum age for a hit?
- 18
What do The Loogaroo request you to bring them?
- Blood
How much is a 1911 on The Bunker?
- $1.200.000
What are the first four letters for Legions hash message?
- MIIF
How old is the Slave Doll Tanya?
- 22
How many pages did Takedownman take down?
- 162 PS: this is not the actual number and might be changed to 165 in the future
Cotton Road - price of Crystal Meth
- $250
Where is the cheapest place to purchase Heroin?
- Family Drug Shop
What is the FacePage login password for Tony Lee Smith from Seattle, WA?
- gearsUPdownUP

Aim of the Satanic Cult?
- Strength
Number of warehouses to chose?
- 4

PS: I don't think that these are all questions.