That checks with what I seemed to be thinking it could do. I went ahead and purchased a GT-50 from Aircraft Spruce and will hopefully have it installed in the next couple of days. I'll add pics and let you know how it goes. There's no STC required if you don't use it to replace any permanent equipment, such as the voltmeter. If you just replace the clock then a simple A&P entry is all that is required. No W&B entry either. It records max/min g loads along with current g loading. Plus a lot of useful features.
Flight Data G-Meter GT-50 12V / 28V The GT-50 is a Six Function: Accelerometer - Clock - Voltmeter - Temperature
www.aircraftspruce.com