The mod should recognize whether gregtech is installed and then replace that uber-expensive thingy with silicon plates for instance.
OR, you could disable the thing you want in GregTech config ?
Seriously, even with GregTech I find the mod OP (thought I appreciate the change in the recipe ), but you guys are saying it's too expensive ... lol. Just try to use a Boiler instead, or Nuclear Reactor/GregTech's Fuel-based generators ...