There are quite a few! It’s a beautiful area. The stretch from Gloucester to Sharpness is stunning, as you have the Gloucester & Sharpness Canal running adjacent to the River Severn. So many Christmas Card villages along the way too.
Crickley Hill Country Park is about 15 minutes east, that has amazing views all around.
All of ones I’ve done around there are on Drone Scene. But to be fair, I’ve not long branched out into Gloucestershire.
Forgot to mention, you also have access to the Wye Valley AONB, running down the west side of the River Severn from Gloucester. Now that place is crammed with great sites.
You may want to add the Great Witcombe Roman Villa too, it’s just over a 5 minute drive from Gloucester. I did a video on it, set in a lovely valley just off the Cotswolds Way.