If NPC instance (type) is L2Npc so it will read its html file from html/default (npcid.htm, for example 1234.htm)
If its L2Merchant, it will read htm file from html/merchant
Etc
Wrong Section.
Read Our Forum Rules.
You should post it here [Request] Dev Help [L2J] En.
Before posting also check Rules of this Section.
Topic Locked.
First of all you can bump your thread once per 24h.
Secondly, if you are to lazy to do it by yourself, its your fault.
Making simple gmshop isn't hard, even to beginer.
Its obvious that it won't work.
Why? (Because using brain doesn't hurt :))
Now think, this BYPASS is related with NPC not community board (means that this bypass is supported by NPC)
Check community board java files and take a look how does bypass handling work there (with similar way like npc ones)