What will happen if I don't show up for a drill in the Air National Guard?

You must attend drill. It isn't optional. Skipping drill is how you get a reputation for being a shitbag.

SPC Adam Louden When I was active the military had a habit of ordering you to return to Active Duty. If you failed to do so they stripped your rank via Courts-Marshall AND/OR confined you to the military prison in Leavenworth, followed by a Dishonorable Discharge.

Dude your profile is nonsensical, which makes me think you're just a troll.

If you're NOT just a troll, then wtf in your military experience ever made you think showing up was *optional*?!!!