From my research, there are 2 possible problems with the headgasket. The first was.. originally it was shy over 20 lbs of torque. After that, it was that the headbolts had a tendancy to stretch slightly (dont quote me on that.. its just whats I read.. never confirmed it).
The 7mGTE (not sure if the GE would suffer as badly) runs very hot compared to my other vehicles.. and thats another "bad" thing. However... I dont think a blown headgasket is inevitable.. Its just common. Once its been blown, if its done correctly, I think they are fine afterwards. Metal headgaskets are overkill for a stock engine.
Thats my understanding, but I am not a mechanic or an expert on it.
Bad Head gasket = more likely then on another vehicle.
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