It's an open deck motor, great for cooling the heads but not for sustained loads under boost. When you have an open deck motor, the cylinders can wobble and compromise the head gaskets like it did on this guy's truck not to mention mine:
Turbo's typically produce more boost than Superchargers and definitely more heat for the intercooler to get rid of since they are exhaust, not belt driven.
The 1GR is a bruly motor, but I don't think it can handle regular loads over 10 PSI of boost without at least upgrading head gaskets, head studs, rods, pistons and a foolproof fuel and timing tune that goes well beyond the realm of stock.
Go hang out on XRU for awhile in the boosted section, over a dozen blown motors due to the possible nature of something's limit being exceeded with otherwise great aftermarket boost goals not taking highly variable and subjective criteria into consideration...
Boost on as they say but prepare to deal with issues of premature wear and having 25-50% less usable engine life depending on how often and how robustly you plant your foot in it.
Personally I am ok with the risk, I need the boost big time in my application, the truck is payed off long ago and I can afford to build a forged 400 HP brute in another 30-50 thousand miles.