Called Thule about crossbars and they haven’t released an AeroBlade low-profile version for the GCL yet but did say that the raised bar feet pack should work if buying the load bars separately. Based on the exterior dimensions of the VW Atlas, he recommended the 53” load bars (wingbar or aeroblade). Other sizes are 47” (too small) or 60” (too big). Links below:
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www.thule.com
The Thule AeroBlade Load Bar Pair at TravelCountry.com, an authorized retailer of Thule products. - Rack Systems
www.travelcountry.com
p.s. Thule doesn’t appear to sell the Aeroblade load bars as a stand alone option anymore (maybe competing with their own products), which is why I posted from TravelCo. (seems to be a scarce item).