Some thinks about Goa Gil you should know about:
1) He's a pioneer and one of the godfathers of Goa. Before everyone Goa Gil was already in Goa (hence the name) and he was in the birth of the genre since day one.
2) Goa Gil was always about power and aggressive beats. If you don't believe me check out his older mixes. Forest Of The Saints contains some of the darker and intense tracks of the era (1998). Gil always prefered the hard dark-ish Goa from the mellow ones which leads to...
3) It's not a suprise for everyone who followed Gil over the years that he ended up to darkpsy. Gil didn't wake up one day and said that he will play darkpsy. He began with goa, moved to darker stuff like Talamasca, then to early dark psytrance like Neuromotor and Parasense and slowly to pure darkpsy stuff. If you don't believe me then check his old charts in his page.
Gil didn't abandon Goa, he slowly moved to another genre. What's wrong with that?
4) Darkpsy artists and listeners treat him like a God (do they really?) in the same way Goa artists treat Simon and AP like Gods too. Gil was there when darkpsy first emerged, so yes he's a grandfather of darkpsy as well and get respect for that.
5) He's an excellent producer as well and here's why:
http://www.youtube.com/watch?v=lOXeL2gwqGU