Safariland describes the system and draw:
Similar to the proven ALS® design, the GLS automatically locks the weapon in place once holstered. When drawing with a proper shooting grip, the middle finger is placed in the exact location of the locking mechanism, allowing it to sweep over the GLS releasing the firearm with a simple, straight-up draw out of the holster. GLS models also feature low-cut sides, aiding in concealment, speed and re-holstering.
The GLS system will be available in paddle/belt/loop comgination (model 5378) and as an belt clip (5379). For those with existing Safariland holsters, the QLS models are compatible with previous 3-hole mounting platforms.
The GLS will originally be launched in 7 fits for common pistols: Glock 17/22, 19/23, 26/27, Smith & Wesson M&P 9/.40, M&P 9/40C, M&P SHIELD, and the Springfield XD-S.
MSRP will be between $46.50 and $53.00. An inside the waistband model will be released later this year.