Gene Simmons appears to be making good on his plan to leave California for Nevada … he just dropped over $8 million for a rockin’ mansion near Las Vegas.The KISS star nabbed a 6-bed, 8-bath palace in Henderson with 11,000 square feet of living space and distinctively modern features … like a floating pathway entrance over a koi pond and floor-to-ceiling glass walls.Gene and his family jewels will have room to move — the place has seriously spacious rooms inside … and outside there’s a pool, hot tub, built-in barbecue and a courtyard. Desert cool, baby!