GS basically tows you to the nearest repair facility that agrees to service your RV/tow vehicle. This is great if you are in an area where you don't have a preferred facility. From what I've heard their 100 mile towing option is 100 miles - not connected to tow truck rates.
AAA tows you up to 100 miles to a facility of your choice - HOWEVER, the 100 miles is actually not 100 miles - it is 100 miles at the standard hourly rate for a standard size tow truck. That means if you need any bigger than a standard car tow truck, you will end up getting less than 100 miles of towing paid for. The bigger the tow truck, the more expensive the rate.
When I had AAA tow my clipper, I needed a "medium wrecker tow truck" and was having it towed 60 miles. Because the tow truck was "special service", there were fewer available and it had to come from an additional 20 miles away. So, the mileage was based on 30+60+80 (travel to my clipper plus travel to my shop plus travel directly back to their home base). The rate for the medium duty wrecker was more than the rate for a standard tow truck (I can't remember the exact costs, so I'm going to use $104.50 for standard tow and $175 for medium duty wrecker tow - as that calculates to about what I remember the various calculations to be).
So, the total expense for my tow was 170 miles at 4 hours x $175 per hour for a total cost of $700. The max cost allowed for the 100 mile tow was 100 miles (1.67 hours) x $104.5 per hour for a total of $175. So, they paid the first $175 of my tow and I had to pay the additional $525 out of pocket. The total actual towing distance was 60 miles.
My point with all that is that just because the advertisement says "100 mile towing", that can be severely limited by other factors.
Since you have your own repair facility, will you always tow your RV home regardless of how far away it is located? 100 miles? 500 miles? 1000 miles?
If so, then AAA might be the better deal KNOWING that you will be paying for some if not most of the towing. They will take you further than the 100 miles (or the comparable rate for that 100 miles with a bigger tow truck).
If you have other vehicles and will often drive the RV withing a 60-100 mile radius of your shop, it could be worth getting one or the other. But if you will only be using outside the area so you can get towed to your shop, it might be more cost effective to skip the memberships and just pay out the tow fees when needed.
