HaggarMen's Solid Gab 4-Way Stretch Straight Fit Flat Front Dress Pant Dress Pants

What does Gab mean?

Is this the H 26 style?

Hubby has Parkinson's and can't do zippers or buttons. Description for this pant states "hook and bar" for closure. Any zipper or button on pant?

I do a lot of lifting at work and need to bend down and squat a lot. Does the pant fabric itself stretch or just the waist?