GNX Side Extension Module (GNX-SEM)

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GNX Side Extension Module (GNX-SEM)

The GNX Side Extension Module adds a new level of realism to the passionate flight and space pilot.

While the GNX-SEM was designed with General Aviation pilots in mind, the module is highly configurable to suit any flight and space sim cockpit.

The SEM can be attached side-by-side to:

  • Gladiator NXT EVO Standard or Premium controller base (from either side)
  • SEM modules (max number of SEM modules in system – 4x)
  • THQ modules (max number of THQ modules in system – 4x)
  • Gladiator EVO Omni Throttle, but only on the opposite side of the throttle’s ‘elbow’. For example, a left-hand throttle only allows attachment on the right hand side. To overcome this limitation a USB Controller can be used which then allows the SEM to be connected to the PC and therefore placed independently of the controller

Up to 4 SEM modules can be accommodated in your cockpit.

Important shipping note
This product is in stock at our Australian warehouse and will be shipped without delay.


  • 1 Rotary switch
  • 2 Multi-function axis
  • 2 K-switches w/ central push button
  • 7 Push buttons
  • 8 Programmable, dual colour LEDs
  • Provides either a total of 24 logical buttons, or 17 logical buttons and 2 analogue axis (based on configuration)

SEM features

SEM features 2


Important: Depending on your configuration of controller/s and GNX modules, you may require a GNX USB Controller. Please check the information on the GNX USB Controller page.

Compatible with


  • SEM
  • Plastic coupler
  • Type-C connector guard
  • Rubber pads
  • Plastic spacers
  • Interchangeable heads
  • Interchangeable detents
  • Internal “module-to-module” cable
  • Internal “module-to-joystick” cable
  • Phillips Screw driver
  • HEX Screw driver
  • Stickers with protective film




  • 1 Year

Customer Reviews

Based on 9 reviews
Great quality for the price.

Despite the plastic feel and look, the buttons and switches are great and have a nice solid feel to them.

This is definitely a must have if you are looking for something reasonably priced!

Gary Domaschenz
Just awesome

Adding this to my gladiator joystick makes the flying experience so much more fun. I have also bought the THQ since this purchase. The GNX has proper well designed switches and buttons. Like all this VKB stuff it is all highly configurable and built to last. I also have the rudder pedals that I could not live without. The support is also amazing.

Hi Gary,

Thank you for the 5 star rating and the positive review.
We also appreciate your nice comment about our customer support.

Regards, VKB Support team

Instructions need updating

The VKB channel installation instruction video needs to be updated to include the Gladiator EVO. It includes a 3-4 pin cable and a 4-4 pin cable, but the video only mentions the 3-4 being plugged into the 3 pin socket port on the Gladiator. The EVO only has one 4 pin socket. Clarification needed. Will update review when its sorted & I get a chance to use it.


GNX Side Extension Module (GNX-SEM)

Thank you very much for the 5 star rating for the GNX SEM, Adrian.

Regards, VKB Support team

Almost Perfect

+ The general idea of attaching the various NXT bases to create one complete table-top panel with one USB connection is brilliant.
+ The device looks and feels great.
+ Ability to change the number of detents for the flaps / gear sliders, or turn them into axes is typically innovative of VKB.
+ Decent number of buttons and switches.
+ Superb price.

- I would prefer if some hats / 4-ways were included to control things like radar. Or even more switches instead of the buttons would have been preferable. I imagine it was a matter of keeping the price down. But honestly I would have happily paid a bit more for more hats and switches.
- Once the detents are removed from the flaps / gear sliders, they feel a bit flimsy.
- There does not seem to be a way to move some of the buttons to a different virtual device like you can do with the axes.

Thank you for the detailed review, Paul.

If you need any help with specific settings please join the Discord channel 'HOTAS/HOSAS/SIMPIT'. This channel is monitored by VKB techs who are more than happy to help.

Regards, VKB Support team