Holy Fu drama.Offroad - unlikely for the SwampGX (the white one...).
And as for the DesertGX, there are 4 modded vehicles in the AZ contingent of the fleet that really are more trail-capable than a stock GX. The GX is for driving something that doesn't have mud tires.
The DesertGX has seen a dirt road in its tenure with us; what followed was quite interesting:
So we run 4 Peaks Road, north of Phoenix, followed by the Apache Trail; a nice, but long & dusty day. Next day: car wash, just to get the dust off. 2 days later: battery dead as a doornail, 5V, didn't like the idea of charging that one. I have a pretty-much-dead (10.7V) Yellow Optima 27F left over, bolt that in, and jump the truck from a leftover Optima Yellow 34/78 (from the Blazer). Drive to Lexus in Scottsdale, warranty on the battery; they say the truck is fine. New battery from Lexus. That battery was dead as a doornail in another 3 days, 2.7V. Claudia, with help from @richardlillard1, finagles the truck back to Lexus. It takes them a bit, but they found a pin had corroded off the ECU - due to water ingress from what is apparently an aftermarket windshield, and presumably, a short at that ECU connector drained the battery each time. Now that truck has a new battery, and a new ECU. And a newly sealed windshield...
That sux!!
Yeah, if more capable trail rigs are @ hand then absolutely keep the GX as it's comfy ride promotes for pavement and long hauls!!