Thanks for your question. Unfortunately, the configuration you're describing will not work with this gate. Because of the way the latch works, gate must be installed in a straight line. The Duragate is another option as it can be installed at angles similar to what you're describing. See PETCO sku number 1309544. Hope this helps!

There is a relatively simply way to take the gate down that leaves the hardware-mounted parts in place but it is not recommended because it leaves the hinge bracket and latch exposed. For maximum safety, always keep gate closed and latched.

Petco sells the Auto-Lock Pet Gate (SKU: 1309650) which has an adjustable width that spans up to 40.5 inches. They also sell the width extension for this gate. You could use the 10.5 inch with extension (SKU: 1309617) and easily span the 48" inches you need. The extension is fixed width. The gate is adjustable so you'd set your gate to 37.5 inches, add the 10.5 inch extension and--voila--48 inches! Here's a photo of the (white) gate with the smaller extension.

Well, you could try the Cardinal Gates Duragate (PETCO SKU 1309544) with the HEIGHT extension (PETCO SKU 1309722). You can add 2 height extensions. The gate stands 29.5-inches tall. Each extension adds 8-inches so that's 16 inches + 29.5 = 45.5 inches. You're now 10.5 inches away from the height you need. Depending on how high you can get away with mounting the gate/how large your dog is, perhaps this will work for you. If he/she is a big pup, installing the gate a bit higher may not be a problem as long as he/she can't get UNDER it! GOOD LUCK!

If you are putting it at the end of the hall--you will obviously be mounting it on a stud. The gate adjusts size at the center of the gate not to outside edges so you will be fine.