1000 points as many guns as possible

1000 points isn't much. especially if you're playing elite list like GK. BUT, you can have some impressive firepower:

Inquisitor Coteaz
Prescience
100

Inquisitor
Servo Skulls x 3
Prescience
64


TROOPS

Inquisitorial Henchmen Squad (3 man)
Servitors w/ Plasma Cannons x 3
60

Inquisitorial Henchmen Squad (3 man)
Servitors w/ Plasma Cannons x 3
60

Inquisitoral Henchmen Squad (5 man)
Jokaero x 2
Acolyte
Rhino
114

Inquisitoral Henchmen Squad (5 man)
Jokaero x 2
Acolyte
Rhino
114

Inquisitoral Henchmen Squad (5 man)
Jokaero x 2
Acolyte
114

HEAVY SUPPORT

Dreadnought
T-L Autocannons
Psyammo
135

Dreadnought
T-L Autocannons
Psyammo
135

FORTIFICATION

Aegis Defence Line
T-L Quad Gun
100

996


Pretty simple here. Coteaz is in command of the quad gun and a unit of servitors, giving the servitors t-l plasma cannons. The other inquisitor gives other servitor unit t-l plasma cannons too.
The 2 dreadnoughts are behind the ADL too with their t-l autocannons at Str 8.
And finally you have 3 rhinos w/ lascannons/multi-meltas/heavy flamers as needs be.