Cosmic ray antinuclei (antiprotons, antideuterons, anti-He) are of great interest in indirect searches for dark matter. Specifically, low energy antideuterons provide an extremely exciting (and essentially background free) channel for indirect dark matter searches. The General AntiParticle Spectrometer (GAPS) is a Long Duration Balloon payload with a very large sensitivity to low energy (<0.25 GeV/n) antinuclei, and especially antideuterons. GAPS uses a novel exotic atom technique to permit antinuclei identification without the use of a magnetic spectrometer, and enabling a detector with a very large geometric acceptance and large rejection power. The GAPS collaboration is targeting an Antarctic flight at the end of 2021.