I’m still on the Belial pathworking following my damnation, but I’m interested in getting initiated into the Draconian current. Should (or could) I do the pathworkings with the Gatekeepers as well as getting initiated into the Draconian current, or is the Draconian current a replacement for the Gatekeeper pathworkings?
TIA.
Certainly can 
There really isn’t anything stopping you, except yourself.
There’s no conflict between the rwo technically they would compliment each other.
They’re technically different, so I wouldn’t think they would interfere with each other? As said above, it seems they could compliment each other. However, I wouldn’t give more effort to one over the other. If you’re going to follow both, I would give your attention to both as equals.