Posted this in the wrong section first. I think this is a better location. Can you help?

I just picked up an older used frame that I like, and it fits me, and... threaded BB shell. It came with some serviceable 105 on it, and I can ride that for a while with no problem. But I have a nice SRAM Red group that I'd love to use if I can. But it's got a BB30 crankset. I searched about but this voodoo is confusing me. I thought about buying a SRAM Red GXP crankset, but it seems they're all 22 speed now.

I'm wondering, ..Is there a good adaptor technology? -- or should I avoid that path at all costs?

Thanks!