Yes, that's the razor. It's a single bladed SE razor that looks & acts like a cartridge razor, but was specifically designed by Gillette to mimic a double open comb DE razor. The handle is not a throwaway, new carts can be fitted on it. The upper comb replaces the sticky gel strip in other cartridge razors.
It's very cheap- carts are 50 cents each at WCS. If you buy in bulk on Amazon or ebay, the cost is brought down still further to almost DE blade levels.
Read Mantic59 on it here.
https://sharpologist.com/2010/12/testing-gillette-guard.html
https://sharpologist.com/2012/05/reverse-innovation.html
And on pivoted single blade razors here
https://sharpologist.com/2018/07/single-blade-razors-pivot.html
I use a Gillette Guard on the days that I'm running late for work & have no time for a DE shave. These days, that is at least once or twice a week. I also use it when ill or have a hangover.
It usually requires the full three passes, but recently, I've been doing an ATG directly after my WTG, with no ill effects.
A quick & dirty way of getting hold of a Guard type razor for trial purposes may to buy a 'Waterless by Venus' razor at Walmart or your local pharmacist. This razor uses a Guard cartridge, but the handle is filled with a material resembling medical lubricant jelly. Ignore the lube & use your brush & cream/soap as normal. I've not tried this method, but I've heard about it. Its probably a good choice for a trial, but I'm not sure if carts can be replaced on the Waterless razor.
Gillette's Treo razor also uses the Guard cartridge, but was designed for shaving-by-caregiver, so its not easy to shave yourself with it. The angles are different.