I don't think that is the GregTech recipe, that's the default one... If it was GT we'd know because it would take Advanced Sunnarium Plates, not parts.
But on the wiki, ftbwiki.org it says there are two recipes for advance solar panels, -one with gregtech and one without, here is the link:http://ftbwiki.org/Advanced_Solar_Panel
I believe the Wiki is wrong. The hard recipe is provided by Advanced Solar Panels itself. You need to look in the Advanced Solar Panels config if you want to change it.