Is it possible to write CGI scripts in B-Prolog

Because of the availability of the interfaces with C and Java, everything that can be done in C, C++ or Java can be done in B-Prolog. So the answer to the question is yes. B-Prolog, however, does not provide special primitives for retrieving forms and sending html documents to browsers. The interface of your CGI scripts with the browser must be written in C or Java.