Beautiful dragon you have there!
Here's some things that may be of help to you:
>1. What is gravid, can a female become gravid and lay eggs without ever seeing another male?
Gravid is another word for pregnant. Yes, they can lay eggs (infertile ones) w/o ever seeing a male!
>2. If so, should I provide a spot for her to lay the infertal eggs?
Yes, she needs a moist mixture of sand & soil (no pesticides in soil). You can use a large Rubbermaid (or similar brand) tub; your medium (the sand/soil mix) should be about 1 foot deep. It should be moist enough so that the tunnel she digs won't cave in on her, but not so moist as to drip when squeezed w/ your hands. Some ppl. use Perlite &/or vermiculite as their laying medium, as well. Make sure to provide a source of heat for her while she's in the laying box.
>3. Do all BD's ?brumate?. Do I need to do something different during winter?
No, not all BDs brumate, & some may one year & not the next. Some may only "semi-brumate," too. Just keep an eye on them & if they occassionally wake long enough to eat, provide heat for proper digestion. Most ppl. adjust the timing of their lights to come on & go off around the same times as the sun rises & sets.
>4. How can I tell if she is gravid? because she has been scratching all over trying to dig for a couple months.
It's can be hard to see or feel infertile eggs. Look for other signs, such as weight gain, loss of appetite, &/or digging. Sometimes, the only absolutely sure way to tell is to have an x-ray done by your vet.
>5. If she is should I try to get a male in there quick to fertalize the eggs.
I don't think that will work, but someone else here may have more knowledge in that area. I wouldn't put a male in w/ her unless you wanted to incubate the eggs & care for the hatchlings. Females store sperm & can have more than one clutch from a single mating.
>Once again thanks for any help and any other info that you may think would help is much appreciated. I do have an incubator and hatchling cages, so I am prepared if she were to have babies, but I need a good male first of course. What would be my next steps?
Once you get a male you wish to mate her with, he should be quarantined for at least 30, preferably 90, days, & be checked by a vet. After that, let them get to know each other & let nature take it's course. I put mine together on the floor for about half an hr./day, everyday until they did their deed. That way, they were each on neutral ground & not stressed by "new territory."
If you think of any other ?s, just ask, as many here are happy to help! 
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God Bless, Beardie Dreams, & Peace!
Pogoniacs