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Is Garmin setting up a replacement (or retirement) for the GMC 507?

canadiangoose

canadiangoose

Member
Like a lot of you, I've been deep down the rabbit hole of next-generation glass panels since the Garmin and Dynon announcements last week. For Garmin specifically, I’ve been noticing a few interesting breadcrumbs regarding the GMC 507 autopilot control head. I don’t have any inside info, of course, but looking at Garmin's recent patterns, it feels like we might be on the verge of a product refresh or a pivot in how they handle AP controls.

Here is the theory and the rationale behind it. I'm curious to hear what others think, especially more experienced builders and owners who've lived through multiple product generations:
  • The Missing Product Page: If you go to Garmin’s Experimental overview page, the GMC 507 is no longer prominently listed or linked in the active menus. You can still find the page directly if you dig or use an old direct link, but they seem to have stopped actively marketing it. It strongly suggests an "available but fading into legacy support" phase of its life cycle.
  • The Current Rebates: They're offering a rebate program for the GFC 500, 600, and 700 systems running through September 15, 2026. I don't believe Garmin has historically discounted its current product lines unless something is coming down the pipeline that they want to clear the deck for.
  • Age and Aesthetics: The 507 has been around for a while now, serving as the evolution of the older 305/307 series. Visually, the design language is completely out of step with Garmin's current lineup. The different plastic texture, button design, and overall aesthetic look out of place sitting right next to a modern GTN Navigator or an Axis display.
  • The "No Center Stack" Strategy: The Axis flight display marketing focuses heavily on being able to completely eliminate the traditional center radio stack (provided you use a remote transponder). Yet, the GMC 507 is the one last holdout still requiring the traditional center stack's 6.25-inch width form factor. It goes against their own stated panel optimization recommendations and apparent strategy.
None of these alone point to a smoking gun, but together they seem to suggest the end of the current autopilot control head.

So, what's next?
  • The "Nothing" Option (Pure Software Integration): They’ve heavily upgraded autopilot touch controls on their screen layouts. Could they just phase out the physical control head entirely for the experimental world? It's possible, but I doubt it. While some experimental builders might be open to this, the certified world requires physical, redundant AP controls for certification compliance, leaving Garmin with an ongoing need for a hardware solution of some kind.
  • A Smaller, Modular Form Factor: If I were a gambler, this is what I'd bet on. Freed from the 6.25-inch center stack box constraint, a thoughtful product designer would probably envision a small, rectangular, or square control module ( similar to what Dynon does with their dedicated AP control heads). Something you can mount flexibly near the top of the glareshield or right next to your primary display, matching the look, fonts, and styling of their modern flight decks. A lot of the Axis design was clearly inspired by the big-boy G3000 PRIME flight deck, and the idea of a differently sized, shaped, and modular AP control head follows that trend.

This is probably most relevant to anyone building or upgrading to the new Axis displays, but I'm curious to hear from others.
 
I am thinking the GMC507 will remain 'as is' at least for the next 5 years.

You do not need a 507 to have an AP yet most experimental pilots chose to fit one.
The layout and use is very straight forward and it does not have the limitations of the 300 series.
I do not see a smaller replacement controller as your hand is a certain size.
I am also not keen on the vertically mounted AP panels as the controls are not as intuitive.

Yes, it occupies the centre stack which on the surface is disappearing.
However, some (including Garmin) are now using this space for a 3rd Axis screen, effectively a larger screen IFR navigator so it does not look like the centre stack is going away any time soon.
 
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it does not have the limitations of the 300 series
Click to expand...

What are the big limitations of the 300 series for you?

I don't have a lot of hours behind the Garmin AP so keen to hear the best practices from people who's tried different layouts and interfaces.
 
canadiangoose said:
What are the big limitations of the 300 series for you?
Click to expand...
Here’s one I know of: If you’re running your autopilot with a G5 only, the 300s can’t give you an audible warning of, for example, autopilot disconnect. Given that the Garmin autopilot is apparently capable of lapsing into unconsciousness for reasons unknown (ask me how I know…) this silence is decidedly Not Good, and in fact would be prohibited in the certified world (other than for VFR LSAs).

I should add that I was an early adopter, and my Garmin autopilot has not had a narcoleptic episode in a number of years. 🤣
 
There are no plans to phase out the GMC 507. It is still a very important and relevant component in our autopilot systems (experimental and certified, both). Internal features and monitors were added during the development of the -507 to satisfy certification needs for the STC'd GFC500 autopilot for certificated aircraft. I personally still highly recommend a -507 (center stack panel architecture or not), in any experimental installation with an autopilot.

B/R,

Brad
 
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