Yes, you can use HGVC points to stay at Hilton branded hotels, but should you is another question.
When you buy a HGVC TS, you get a HH membership as a component of your HGVC ownership. If your TS is co-owned with another, you get a joint-HH account; however, only the first named person is in control. Bookings are in their name, but others may be designated as guests. If you prefer to use a pre-existing HH account, you need to list it on the transfer paperwork, or you'll have to contact HH later.
There are two ways to use your HGVC points for hotel bookings: (1) You can convert next year's HGVC points to HH points (ratio = 25:1), and book using the HH website. The HH points show up in early January the next year. (b) You can book a hotel directly by calling HGVC - without converting -(ratio = 20:1).
HOWEVER: Using HGVC to book HH hotels is a notoriously poor use of points. For the points it takes for 1N in a hotel (points converted or not), you lose several nights at a HGVC resort.
Example: A 4N weekday stay (M-F) or 2N weekend in a HGVC Studio (like a hotel room) in Orlando may run 960 HGVC points. Converted (25:1) that equals 24,000 HH points, which might score 1N in a Hampton Inn in a run-down section of town, or perhaps half a night near the theme parks.
So, it is to be avoided, unless there's a special need, like to complete a vacation you would not otherwise take or to stay in a special place which you could not otherwise afford.
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